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Geary Geary is offline
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Join Date: Feb 2003
Location: Kailua, Bend, & Tamarack
Posts: 1,573
"Better feeling" oils aren't necessarily protecting parts better, they're merely allowing smoother shifts. Long term EP (extreme pressure) protection is far more important if doing any track/street racing. The two factors (EP protection / smooth shifting) are not related, so a particular oil may provide silky smooth shifting while providing piss poor EP protection. I could name oils that fit in this category.

Swepco provides excellent EP protection, whether installed in the 930 4-speed or G50/50 & G50/52 5-speeds. Swepco also provides good shifting in the 4-speed, and decent shifting in the 5-speed. The synthetics mentioned in this thread may provide slightly smoother shifting, but they probably won't provide the same level of long term EP protection.

A number of companies making synthetic gear lube have changed their formulation over the past few years , and the end customer has been paying dearly for these changes (which never seem to be for the better). I see the 901 Shop mentioned .. they are just one facility that has learned the hard way in their own race car, when using one of the "evolving" synthetic oil mentioned in this thread. So, they tracked down a better solution, settling on a very high quality non-synthetic .. similar to Swepco or Kendall in terms of long term EP protection.

In fact, there are a fair number of well-known shops who have gone back to "known quality" non-synthetics for their customers late model Porsche race cars .. something to think about at the next oil change.
Old 05-17-2012, 06:26 AM
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