As you might expect, Porsche uses a totally unique spec full synthetic gear oil. Gear oil manufacturers, the honest ones anyways, admit that they do not have a compatible lube. Mobil 1 sent me an email in response to one of my customers questions on the subject, stating : “Currently, Mobil 1 does not produce a gear lubricant suitable for Porsche applications.” Other manufacturers have been less forthcoming in what they say.
Perhaps more interesting, we have switched several cars back to the OEM product after they had been using Red Line, RP, Amsoil and other “blends”; the common response has been, “Wow, it shifts much better…..” Considering what these gearboxes cost, and the fact the OEM stuff is not expensive, why bother?
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“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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