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1990 964 Porsche Oil and tranny Fluid

Engine

Vehicle Information: Model: 964 c4; Year: 1990; Body Type: Coupe; Total Mileage: 101500;

What is the best motor oil to use for a 1990 c4 coupe with a little over 100k miles. I just purchased this beauty and I want to change the fluids. I live in a pretty mild climate during the winter. (n.calif Also, what about the tranny fluid? I've heard swepco is the best stuff?? Please advise

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