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2004 Outback 2.5ltr wagon auto petrol
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29 Posts
Discussion Starter #1
Been reading a lot about ATF being self-cleaning. Drain and add 4 litres, and resulting contents should be as good as new. But with no previous history available and not knowing what is in there at present, can one mix different brands of ATF without causing significant problems?
 

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Somebody Else's XT
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14,437 Posts
That's a valid concern. In theory you would only ever have Subaru HP fluid in there, but somewhere along the line someone may have tried their luck with a generic.

In my experience, a single drain & fill is good enough most of the time, and I haven't run into one so far off that 2 back to back drain and fills couldn't take care of it.
 
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