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Should I continue to use Dexron III or the Dexron III synthetic ATF oil for my 1964 Buick Riviera?

Jack Seddon
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I doubt you will find either of these options available. Manufacturers are no longer able to produce ATF and call it "Dexron III". GM has replaced that fluid with Dexron VI which is fully compatible.

Whether it's fully synthetic or not doesn't make much difference. They both have the same specifications.

jwh20
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