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Caveat (archive)

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Posted by Jon Lewis on January 15, 2001 at 21:55:55:

In Reply to: Synthetic and mineral posted by Lee on January 15, 2001 at 20:49:37:

This is a good rule of thumb for older cars. It does not apply to many new cars however. Recent products from Porsche, Triumph & Beechcraft, to name three non-bmw brands, recommend synthetic oils. BMW's new "preferred" oil is at least a synthetic blend.

If you have an engine rebuild, let the builder guide your first oil change or two. Many high-end engine rebuilds suggest synthetic.

In the first thousands miles of an engine, mineral oil should be used. After it has ben worn-in, then it is no problem to switch to synthetic. Going back and forth between those two kinds of oil is not going to harm the engine.

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