aw32 hydraulic oil vs universal

2021/05/21

so it sounds like a UTF is a better built oil by a degree with a better add pack? Different machinery such as car transmissions and factory machinery used hydraulic fluid to run sufficiently. You trans likely doesn't take hyd fluid.. but rather utf fluid what you added was the equivalent of 'jack oil' One of my customers had a buck it takes UTF the problem might be caused by the low oil level that you had or by another problem. (Mysteries Resolved). There is a range of different types when it comes to hydraulic fluids and each one has its own unique properties. Once you find the specified weight of oil you need, you may find that some hydraulic oils are labeled ISO, and others AW. These oils are the same weight, but AW oil also has anti-wear properties, hence the name. The final viscosity will end up being variable and based upon the viscosities of the mixed fluids and how much fluid was mixed. I typically run torque fluid in our hydraulic applications, http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=530339#Post530339, Different between AW 46 hydraulic oil and tractor hydraulic. This keeps components free from deposits, but it also means that contaminants do not settle out they must be filtered out. If this occurs the oil spray can easily ignite under high-pressure conditions. There is a difference in the two types of fluid. Huge amount of 303 sold here, very few antique tractors running much, most parts guys will claim it's good for john deere tractors because it says j20b, which would be fine in a synchro. Rust and Corrosion Protection: When moisture is present, the superior rust and corrosion prevention capabilities reduce maintenance. Do you mean if given choices between UTF and AW hydraulic oil, which is the better? Use these factors, along with otherviscosity considerations, to make the best choice for your needs. They have friction modifiers as are needed in hydrostatic transmissions, EP (extreme pressure) additives for things like gears, usually have a much higher anti-foam additive package and so on. Of course, hydraulic oil with a viscosity of 68 is much thicker than 46. This helps to reduce corrosion in hydraulic systems allowing them to perform well under many different temperatures. Nonflammable and commonly used for aircraft hydraulic systems. 5 Which hydraulic oil is thicker? SAEISO/AW The purpose of antiwear additives is to maintain lubrication under boundary conditions. Hydraulic oil that has a higher flash point is recommended below. DIN 51524; HLP-D fluids are a class of antiwear hydraulic fluids that contain detergents and dispersants; the use of these fluids is approved by most major hydraulic component manufacturers. Here are some most used hydraulic machinery available in the market: A piece of quality machinery is a necessity. Perhaps for your construction vehicle or equipment. Now that Ive given you an idea lets dive into the details!if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[336,280],'woodhungry_com-banner-1','ezslot_3',129,'0','0'])};if(typeof __ez_fad_position != 'undefined'){__ez_fad_position('div-gpt-ad-woodhungry_com-banner-1-0')}; 303 Hydraulic Oil vs AW 32: Detailed Comparison. This simplifies things. In colder weather applications, such as the pump of a snowplow, you can use AW 32 hydraulic oil. This is not ideal, particularly in mobile hydraulic systems which have a small reservoir with poor deaeration characteristics. General question here,a loader can use either hydraulic oil as it is a dedicated system, does not share any other sumps trans/drive gear,etc hydraulics only,no cold operating temps. the single factor that should weight the heaviest in determining the best choice of fluid to use is. These all affect the performance of a, The Definitive Guide on How to Pressure Wash a House With Vinyl Siding, 3 Best Karcher Pressure Washer Reviews That You Can Depend On 100%, 5 Pressure Washer Detergents and 7 Things to Consider Before Buying [Bonus: Homemade Detergent], How to Clean Gutters With Pressure Washer, How To Adjust Foam Cannon in 10 Minutes [Soap Ratio+PSI+GPM]. Tractor hydraulic fluid comes in many types. This ensures that one brand's 30-weight oil is the same viscosity as another's. What do you notice/like about the Schaeffer's? 303 was the hyd. Reserve Quality: AW hydraulic oils can keep their high level of performance even under the most difficult working and draining situations. Following these guidelines will help make this the best resource for heavy equipment on the net. Few corrosive problems. HFI supplies hydraulic fluid three ways, 55 gallon drum, 5 gallon pail, and by-the-gallon for walk in sales The Blend (Schaeffer's #254) or the full synthetic Amsoil AWJ should provide the necessary AW protection and viscosity requirements for your loader. How to Protect Outdoor Wood Furniture from Elements?

The HFI Filter Element Wizard allows you to input your mfg part number and will return all interchanges found in its massive database. Oil with a higher viscosity grade has thicker oil which is more solid-like. For use in a wide range of hydraulic systems, this top-tier oil is made with premium lubricant base oils and additives. Fire-resistant and suitable for high-temperature applications. When selecting a high VI or multigrade fluid, it is recommended that the hydraulic component manufacturers minimum permissible viscosity values (Table 1) be increased by 30 percent to compensate for VI improver sheardown. Below is a reference table that will help you convert oil weight to ISO or AW rating. AW oil is a premium oil designed for use with all hydraulic systems which recommend the use of anti-wear hydraulic oil.. I personally think IH Hytran is the best hydraulic oil on the market but man I cannot afford it. It is always best to avoid mixing different types of, The most important factors of hydraulic oil are viscosity, wear corrosion and fire-resistant properties. The main difference between 32 and 46 hydraulic oil is that 46 is thicker and has a more solid-like texture than 32-grade oil. 7 What is the difference between ISO and AW hydraulic oil? whats the better oil? The hydraulic fluid/oil is designed for one thing only and that is as a hydraulic fluid. Despite their similarities, Ive tried my best to bring out the differences between these hydraulic fluids. Answer: Theyre made for use in a variety of tractor and heavy-duty machinery components. For these reasons, Id like to recommend you to use AW 32 Hydraulic fluids for your hydraulic equipment. AW stands for anti-wear hydraulic oil. Of course, 68 hydraulic oil is even thicker and more solid-like than 46. A ZDDP concentration of at least 900 parts per million can be beneficial in mobile applications. Therefore, 46 hydraulic oil is considerably thicker than 32. You are using an out of date browser. Here is my view: Each oil or lubricating fluid generally has a specific formulation for a specific application. On the other hand, if the viscosity is too high, heat can generate and energy consumption can increase leading to a breakdown in the hydraulics. ISO grade (32, 46, 68) fluid to be used should fall within the range of the. Products.

What Are Different Types Of Hydraulic Fluid? I'm an engineer for a major hydraulic component (pump/motor/valve) manufacturerand we design and test our components for use with AW hydraulic fluid. However stay away from the stuff in the yellow bucket from Orchlen's. Piston Pumps and Motors UTTF is beoming more widely distrbuted and used in oder to reduce inventory or reduce the need to stock various fluids. Detergent oils have the ability to emulsify water and disperse and suspend other contaminants such as varnish and sludge. Go Wolverines! When you cant appear to find the proper one for you, it can be tremendously maddening. The viscosity index (VI) improvers used to make multigrade oils can have a negative effect on the air separation properties of the oil.1. I bought 15 gallons of HY Guard. It doesnt matter how good the other properties of the oil are if the viscosity grade is not matched to the operating temperature range of the hydraulic systemwhere it will be used. While hydraulic oil is used to transfer power, tractor fluid is a medium for lubricating moving parts within the transmission such as bearings, final drives, and a wet brake system. There are no universal standards for hydralic oil like there is on engine oil. Despite their similarities, Ive tried my best to bring out the differences between these hydraulic fluids.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[250,250],'woodhungry_com-large-mobile-banner-1','ezslot_8',132,'0','0'])};if(typeof __ez_fad_position != 'undefined'){__ez_fad_position('div-gpt-ad-woodhungry_com-large-mobile-banner-1-0')}; Hopefully, I was able to assist you in determining which of these options is best for your hydraulic apparatuswishing you the best of luck with your hydraulic equipment. We'd appreciate any help you can offer in spreading the word of our new site. Thanks for joining us and I hope you enjoy your stay!! For a better experience, please enable JavaScript in your browser before proceeding. Protects against excessive pressure and wear. JD is cheaper if you buy it by the 55 gal drum. 2003 - 2022 Blain Supply, Inc. Prices were current at the time of posting. It's the best hydraulic fluid out there. This will allow all of our members to see your question and give you the best chance to be answered. ALL NEW MEMBERS READ THIS FIRST!! Protect the transmission, axles, and hydraulic pumps on the tractor. The tractor is a 'geared' tractor. 1998. hbspt.cta.load(3951034, 'c99217f3-09e7-4751-bc3a-7739dac44a0e', {}); Brendan Casey has more than 20 years experience in the maintenance, repair and overhaul of mobile and industrial equipment.

supplies Leak Detection solutions through Spectronics Corp. Mannesmann Rexroth. So, if youre looking for oil for the hydraulic system that raises and lowers the bucket, you most likely needa universal tractor hydraulic fluid or an ISO-specified hydraulic oil. Passenger Car Motor Oil (PCMO) - Gasoline Vehicles, New to EcoDiesel - questions about first oil change. We have seen reduced life and efficiency with other fluids. Jon. UTF type products have a greatly different additive package than plain hydraulic oils. For more maintenance tips, visit Blains Farm & Fleets Automotiveblog. Thanks MolaKule thats exactly what i was looking for thanks helps allot,the one issue why i was leaning toward AW is because of the various viscosities available,UTF seems to really thin when warm to hot at op temps and even in a properly working hyd system you can could loose performance from what i've experienced,but maybe there was other issues at fault. But the equipment has to be designed to use it. Period. It is possible that an additive contained in one hydraulic fluid could travel up through certain hoses in vehicles and react with high hydraulic power and high voltage, potentially causing some sort of explosion. Heavy Duty Piston Pumps and Motors, Medium Duty If the hydraulic system has a narrow operating temperature range and it is possible to maintain optimum fluid viscosity using a monograde oil, it is recommended not to use a multigrade for the reasons stated above. Thankyou for all the suggestions. One is a hydraulic oil only and the other is a UTF (universal tractor fluid). To meet the various needs of different systems, there are six types of hydraulic fluids: There are three grades to consider with hydraulic fluid; the viscosity grade and hydraulic oil type grade 32-46-68. If you choose a viscosity grade incorrectly, your hydraulic components will degrade faster than they should. Although many manufactures of hydraulic fluid provide various grades of detergents and oxidation stability in the fluids they produce, This means that under certain conditions, the use of a multigrade can reduce the power consumption of the hydraulic system. Stabilized ZDDP chemistry has largely overcome these shortcomings, making it an essential additive to the fluid used in any high-pressure, high-performance hydraulic system, such as those fitted with piston pumps and motors. 2 What is the difference between ISO 46 and AW 46 hydraulic oil? Gear Pumps D/H/M Series, Series 40, 42, 51 & 90 CW S-8 hydrostatic motor, Web Design JavaScript is disabled. Using a UTF type oil as hydraulic oil is fine, using a hydraulic oil where a UTF type oil should be used isn't. We sent a confirmation email to this rewards account. Reduces pollution in cases of oil leaks or hydraulic hose failures. I don't see how the wrong fluid, if it really is wrong, would affect a gear tranny. Some good chainsaw chains are recommended below.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[250,250],'woodhungry_com-medrectangle-4','ezslot_4',139,'0','0'])};if(typeof __ez_fad_position != 'undefined'){__ez_fad_position('div-gpt-ad-woodhungry_com-medrectangle-4-0')}; You can use these products without worries. ISO stands for International Organization of Standardization. if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[300,250],'woodhungry_com-leader-1','ezslot_7',131,'0','0'])};if(typeof __ez_fad_position != 'undefined'){__ez_fad_position('div-gpt-ad-woodhungry_com-leader-1-0')}; Answer: The main reason we use oils instead of water in hydraulic systems is that water has a low boiling point, which means it might start boiling inside a hydraulic cylinder in high-temperature applications, causing corrosion. Filterability: Filter clogging and deposits are prevented by superior hydrolytic stability and rapid water separation. Toxic and corrosive toward zinc, magnesium, and aluminum.. thoughts???? Environmentally safe with good lubrication properties, average viscosity, and less expensive. Its a non-detergent zinc-based oil with outstanding oxidation, as well as rust and foam inhibitors. AW oils are made from petroleum-based and an anti-wear additive (usually zinc dialkyl dithiophosphate ZDDP) to protect the hydraulic pump. provided the customers supplies a container for the oil. Extremely Clean: For ultimate system protection, further filtering offers ultra-clean oils in certain viscosity ranges. It is always best to avoid mixing different types of hydraulic fluids as each one has different formulations and additives contained within.

SO the crap oil you buy at orschelns or TSC can claim all day long that they match the specs because there are known and they cant be held liable. But when I said I put in "not too much" fluid, the amount it took was almost a gallon - but I didn't overfill it. Certain hydraulic fluids have a scent while others are completely odorless. The only difference is that there are additives contained within the oil when dealing with AW 32. I am going back to.spending the extra money for jd oil this winter. We reserve the right to change prices without notice and to correct errors. So, the first thing about your equipment that you need to know is whether the hydraulic and transmission fluids in your tractor are connected. The lower the number, the thinner the oil will be while the higher the number, the thicker the oil.

The presence of ZDDP is not always seen as a positive because it can chemically break down and attack some metals and reduce filterability. The ISO provides standards for the viscosity of hydraulic oils in order for the public to know exactly what they are purchasing. A decent universal fluid will be fine in a tlb hyd system, I've used it in my 2 fords, my Case, and my b-in-l uses it in his Long, his JD and his JCB. When you cant appear to find the proper one for you, it can be tremendously maddening. Low lubrication ability and not suitable for high-temperature applications. A hydraulic fluids primary role is to transmit energy throughout the system, allowing work and motion to be completed. We welcome you to register using the "Register" icon at the top of the page. 30W100 You should also consider its viscosity, fix resistance, and whether it is environmentally stable. Now you might be confused between 303 hydraulic oil vs aw 32? Although varied in their uses and purposes, tractor fluid and hydraulic fluid are similar but not the same. Hydraulic oils are used in excavators and bulldozers, traction control, power steering systems, automated gearboxes, garbage trucks, elevators, and industrial machines or to fix your ripping chainsaw. JavaScript is disabled. It normally has a more robust additive package, and also a higher viscosity index/lower pour point. ISO (International Organization of Standardization) refers to the oils viscosity while AW stands for anti-wear. Depending on temperatures, oil viscosity changes as it can become thinner in hotter temperatures and thicker in colder environments. 8 Is universal tractor fluid the same as hydraulic fluid. J, R, and S Series Motors and Disc Valve Motors, G2, G3,G4 pumps & motors; G8, G9, G10 pumps, Gear Pumps PGH Series. Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. Most hydraulic oils are measured with the ISO grade but some with anti-wear properties are measured in other ways because they contain additives within the oil. The quality is typically determined by the manufacturer. These can be desirable properties in mobile hydraulic systems, which, unlike industrial systems, have little opportunity for the settling and precipitation of contaminants at the reservoir, due to its small volume. If you have considered all of the above questions, it is a good idea to review the OEM's (original equipment manufacturer's) specifications. ISO and SAE are standardized specifications that define oil weight. The main difference between hydraulic oil and hydraulic fluid is that the latter is used in automatic transmissions such as automobile systems. Picking the right viscosity grade (sometimes referred to simply as the "hydraulic fluid grade") is the single most important factor when selecting a hydraulic oil or fluid. AW oils are generally superior to ordinary ISO oils for use in older tractors. These are usually used in hydraulics but tell you nothing about the additives that may have been used. Thank you for joining Heavy Equipment Forums! Anti-wear agents are necessary for AW 32, and they may also contain other chemicals that may be hazardous in some applications. What you want is demulsification for water separation. Yes, you may be ok with the UTFbut why try something, when you know the AW is made for it. Firstly, to understand what these hydraulic oils are, you will need to know what they stand for. 10W32 In tractors and implements, lubricate the transmission, differential, and final drive gears. One fluid may be environmentally friendly when the next could be dangerous to our ecosystem. The main reason we use oils instead of water in hydraulic systems is that water has a low boiling point, which means it might start boiling inside a hydraulic cylinder in high-temperature applications, causing corrosion. 2022 TractorByNet.com | TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners. referencing the manufacturer and model pump used in your equipment or fluid powered system. Hydraulic fluid is very useful in hydraulic systems such as excavators, garbage trucks, and hydraulic brakes. In your case, I think the average AW hydraulic fluid is sufficient for your application. Medium Duty Piston Pumps and Motors - Non-charged The more you know about your equipment, the better you can maintain it and make sure youre putting the right parts, fuel, and oil in it to keep it running well for a very long time. Charged Systems, 6 Is hydraulic oil the same as hydraulic fluid? The main concern with these fluids is that they have excellent water emulsifying ability, which means that if present, water is not separated out of the fluid. Discussion in 'Lubrication' started by Quintonhall, Oct 7, 2012. HFI Fluid Power Products does not actively involve itself with hydraulic fluid technical advice. Mixing fluids with different viscosities, but are still the same type, will impact the viscosity of the lubricant. A UTTF is one of those fluids designed as a "fluid for all" hydraulic AND gear case/clutch applications as a way to reduce inventory. These all affect the performance of a hydraulic system. It actually had sperm whale oil in it. I have had all sorts of issues with the transmission this summer, poor shifting, louder, hotter. We've added a virtual rewards card to your account. Eco-friendly. Theyre made for use in a variety of tractor and heavy-duty machinery components. (At least I don't think it is over filled) The level is way down inside the case still. 3 What is the difference between ISO 32 and AW 32 hydraulic oil? (Everything You Need to Know), Danish Oil Advantages and Disadvantages (A Detailed Guide), Best Wood For Computer Desk (9 Types Explained). These numbers simply refer to the viscosity and not the quality of the oil. The oil isnt only a medium for energy transfer but also acts as a coolant and lubricant. 1. ISO classifies these oils as HO (hydraulic oil). If you dont have your owners manual, you should contact the nearest dealership that sells or services tractors with the same make as yours. Your email address will not be published. Light Duty Pumps. These range from heat transfers, sealants, lubrication, to the removal of contamination. Anti-wear agents are necessary for AW 32, and they may also contain other chemicals that may be hazardous in some applications. possible id prefer uttf/ thf instead to keep the water dissolved How Do You Know if You're Using the Right Hydraulic Oil? Emulsified water can be turned into steam at highly loaded parts of the system. ISO 46 is not better or worse than AW 46 hydraulic oil. Out of all hydraulic fluids, hydraulic oil is the most common and this is why many people use these terms together.. Whatever oil I just make sure it says J20c. Older tractors and collector tractors have separate transmission and hydraulic systems that use fluid from different reservoirs, and need separate fluids for the different systems. The specifications are usually determined by the weight and viscosity of the oil. Hydraulic oil is a highly flammable fluid. Using hydraulic fluid that is damaging to the environment could have dire consequences for many years to come. If you are new to forums we communicate with "Threads", please search our threads to see if your topic may have already been answered and if not then click "Post New Thread" in the appropriate forum. If fluid viscosity can be maintained in the optimum range, typically 25 to 36 centistokes, the overall efficiency of the hydraulic system is maximized (less input power is given up to heat). As MolaKule mentioned, it makes inventory management easier. Fire-resistant with certain additives. Basically, it depends on your requirement for work. When possible, always use a name brand AW hydraulic oil in a hydraulic only system. Protective Gear: The premium anti-wear technology provides protection that passes the pump tests of leading hydraulic equipment manufacturers, resulting in longer service life.

Both fluids differ because of their properties and applications. AW 32 must contain anti-wear agents as well as other additives but these can be harmful to some applications. The most important factors of hydraulic oil are viscosity, wear corrosion and fire-resistant properties. But thats not all of it. They can also be used to lubricate reciprocating compressors that are minimally loaded, just like 50:1 vs 25:1 mixing. PF2006/8, PF/PV4000, and PF/PV6000 series. I switched my mxm to tsc oil this past winter. Question: Is there a difference between AW32 and ISO 32? The dealer prices it. In your case, I think the average AW hydraulic fluid is sufficient for your application. There may be a warranty-related reason to follow the equipment manufacturers recommendations. oil JD used back in the 70's. I'll probably settle on a UTF. These oils are available in many viscosities and have a range of additives applied for anti-wear purposes. Hydraulic oil contains additives as well as oil. Mixing different hydraulic fluids can cause serious damage to machinery and even be life-threatening. Its a non-detergent zinc-based oil with outstanding oxidation, as well as rust and foam inhibitors. Avoid these problems by maintaining water content below the oils saturation point at operating temperature. ). Does Maple Stain Well? Does Oak Stain Well?

manufacturers, resulting in longer service life. The Seven Most Common Hydraulic Equipment Mistakes, How to Combat Leaking Hydraulic Connections. Required fields are marked *. and drained out during an oci.

Would you like to receive an Internet Welcome Kit loaded with free I typically run torque fluid in our hydraulic applications. Unsuitable for low-temperature applications. e.g. Answer: ISO 32 is merely a viscosity range for industrial oils, which are commonly used in hydraulics; it makes no mention of any additives that may be present. ISO 32 is merely a viscosity range for industrial oils, which are commonly used in hydraulics; it makes no mention of any additives that may be present. If your vehicle or machinery is in need of some care, hydraulic fluid could be the savior. The information on this page is presented as a courtesy for our web guests. Every type of hydraulic fluid is made with different chemicals with varying characteristics. Therere a few more aspects to consider before deciding which one is more appropriate for you. Some good chainsaw chains are recommended below. When it became wrong to kill whales, they reformulated the oil & called it Hy-Gard. hose assemblies, as well as components such as valves. Hydraulic oil can not be used in these systems or for these purposes.

The most common antiwear additive used in engine and hydraulic oil is zinc dialkyl dithiophosphate (ZDDP). I would never use it for anything important. They should be able to look up the manufacturer recommendations for you. I think you need to do a little shopping on your oil. 4 Can you mix different types of hydraulic fluid? TSC 's Travellor Universal hydraulic fluid states it's rated J20C for new JD tractors. If the final viscosity is too low, the film thickness wouldnt be enough to provide enough separation between two bearing elements and this could lead to failure. The big companies like CAT, John Deere, Case IH, etc do not release their specs. This is one reason why many people prefer to use hydraulic fluid instead. Hydraulic oils are used in excavators and bulldozers, traction control, power steering systems, automated gearboxes, garbage trucks, elevators, and industrial machines or to fix your. You are using an out of date browser. Mineral Oil-based Pressure Fluids for Vane Pumps, Radial Piston Pumps and Gear Pumps as Well as GM, GMRP, MCS, MCR, MR and MKM/MRM Motors. (RE 07 075/07.98), p.2. The main difference between both is that AW oils have additives contained in the oil while ISO oils do not. Ensuring you find one that is compatible with seals, bearings, and other components is vital to help hydraulics run smoothly. I can't imagine putting a small amount of #46 hydraulic fluid in there would cause a problem like you describe. HFI Fluid Power products BTW keep an eye on the front bolster where it bolts to the engine they tend to break bolts there the original bolts were soft. Do you intend to purchase hydraulic oil for your hydraulic equipment or machinery? If the ambient temperature is outside this range, you cant use 303 hydraulic oil. To choose the right fluid viscosity grade for your particular system, you will need to consider: starting viscosity at minimum ambient temperature, maximum expected operating temperature, which is influenced by maximum ambient temperature, permissible and optimum viscosity range for the systems components. It may not display this or other websites correctly. It's about the same price as Hy Tran and Hy Gard But it is a LOT better. After you've made a number of posts you will graduate to Full Member status where you'll see a few more privileges. Water-in-oil is fire-resistant with good viscosity and lubrication properties. These standards were created over the years by various experts in each field. For these reasons, Id like to recommend you to use AW 32 Hydraulic fluids for your hydraulic equipment. There are some concerns when using multigrade fluids in hydraulic systems. Looked inside after the bucket was empty and the bottom was coated with a layer of blackish residue. For use in a wide range of hydraulic systems, this top-tier oil is made with premium lubricant base oils and additives. These tractors require a trans-hydraulic fluid. AW 32 is most ordinarily used in hydraulics using vane, piston, or gear pumps, particularly when pressures surpass 1000 psi. The base oil quality and quantity of additives mean that certain AW oils perform differently and affect the price point of various lubricants. Deere doesn't price oil. Water accelerates the aging of the oil, reduces lubricity and filterability, reduces seal life and leads to corrosion and cavitation. Uses sunflower, soybean, rapeseed, etc as the base oil. If draining out water isnt For mobile hydraulic equipment users, this translates to reduced fuel consumption. This ensures that one brand's 30-weight oil is the same viscosity as another's. Easily oxidized and absorbs moisture. Hydraulic fluid is primarily used to transfer energy but it can be used in other ways too. However, in some applications, especially those with extremes of temperature or other unusual operating conditions, using something different than what the manufacturer recommends may increase hydraulic system performance and reliability. AW oils usually doesent dissolve water, instead the water falls out in the bottom of the sump were its supposed to be