Power Steering (PS) fluid provides the necessary hydraulic/fluid pressure for the working of the power steering system. Besides this, it lubricates and cools down the steering components. The PS fluid also acts a sealant and prevents corrosion. The power steering fluid has low compressibility, low volatility, high viscosity and high resistance to fire. With so many requirements, it's no wonder that there is a plethora of formulations on the market. Many vehicle manufacturers utilize specialized fluid. These fluids are designed to work in specific systems and usually give the best results.
|Acura||All||Honda P/S Fluid|
|BMW||All from 9/91 Production||Pentosin CHF 11S|
|BMW||All from 9/91 Production||Pentosin CHF 7.1|
|chrysler/Dodge||Post-1998(unless specified)||ALT F4|
|chrysler/Dodge||All pre-1998||P/S Fluid|
|Daewoo||All||Dexron II or III|
|General Motors||All||P/S Fluid|
|Hyundai||Check Application||P/S Fluid 3 or Dexron II|
|Jeep||09-05 Grand cherokee, all engines||WK Hydraulic|
|Jeep||09-06 Commander,5.7L||WK Hydraulic|
|Jeep||07-06 Commander,3.7L & 4.7L||WK Hydraulic|
|Jeep||All Post-1998(unless specified)||ALT F4|
|Jeep||Pre-1998 & pre-2005 Grand Cherokee||P/S Fluid|
|Infiniti||All||Dexron III or equivalent ATF|
|Isuzu||All||Dexron II or Dexron III|
|Kia||Check Application||P/S Fluid or Dexron II|
|Land Rover||All||Dexron II or Dexron III|
|Lexus||All||Dexron II or Dexron III|
|Mazda||All||Dexron III or equivalent ATF|
|Mercedes-Benz||Check Application||Pentosin CHF 11S|
|Mercedes-Benz||Check Application||P/S Fluid|
|Mini||All||Pentosin CHF 11S|
|Mitsubishi||Check Application||P/S Fluid or Dexron II|
|Nissan/Datsun||All||Dexron III or equivalent ATF|
|Porsche||All||Pentosin CHF 11S or CHF 202|
|Saab||Check Application||Varies by Application|
|Scion||All||Dexron II or Dexron III|
|Subaru||All||Dexron II or Dexron III|
|Suzuki||All||Dexron II or Dexron III|
|Toyota||All||Dexron II or Dexron III|
|Volkswagen||All from 4/89 Production||Pentosin CHF|
|Volkswagen||All from 3/89 Production||P/S Fluid|
|Volvo||Check Application||Varies by Application|
Please note: This is not a comprehensive list and is meant as a general guideline only. Refer to the manufacturer's specifications before providing any service.
If you're asking yourself "Which power steering fluid should I use?", take a look at our chart above. There are also a number of systems that use automatic transmission fluid for power steering. These systems are usually designated with the words "Use automatic transmission fluid", "Use Dexron" or "Use Mercon" written on the fill cap or in the owner's manual. Automatic transmission fluid is fine for systems designed to work with it, but should never be used in a system that calls for power steering fluid. Due to a huge number of factors, no guide can replace an individual manufacturer's recommendations. The above is a general guide but should be verified for specific makes and models.
Most power steering problems involve leakage. Over time, seals get hard and debris wear down the sealing surfaces. Both problems are made far worse by dirty power steering fluid with depleted additives. Replacing power steering fluid is very easy and will save you a big headache in the long run. The recommended interval to change the PS fluid is often specified in the owners' manual. If you find any discoloration in the fluid, you should replace it.
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