I have an Oldsmobile Alero, year 2000. What is the best replacement ATF to use with this car? I have read that Dexron III was originally recommended. I have also read that GM is now using only Dexron VI (6) for their vehicles--even for older ones like mine. Can I just have the current ATF drained and replaced with fresh Dex VI?
FYI: The car's ATF has been replaced several times over the years. I just let the dealership do it and do not know what they put in.
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