I have a question regarding fluids. Ok Im pretty sure that Dexron 3 and SJ rated oil wasnt available back in 1986. So lets say you put Dexron 3 in a transmission that was designed for Dexron 2 and you put SJ oil in an engine that was designed for the highest rated oil at the time (1986). Would the newer more advanced fluids be better for the car or do they just make a negligible difference. Thanks

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Adam,
2003 Volkswagen Golf GL 24,000 miles. 1.9L I-4 TDI 5spd.

1986 300E. 115,000+ miles. 3.0L I-6 1st daily ride, around town only. (Gone)