There were some posts about this a while back and I mentioned that Porsche shipped all new cars with synthetic in engines and transaxles, then someone said that yeah, but the new ones are liquid cooled.
Thought I remembered that Porsche began using synthetics quite a while back so did some research and sure enough, Porsche's use of synthetics as standard in new cars dates back to 1992 with the air-cooled cars. According to my information the engine oil used was 10/40.
A few years ago (1999?) Bruce Anderson (author of "The 911 Performance Handbook") did some dyno tests on synthetics in 911 engines and found that Mobil 1 synthetic 0/40 gave 4 to 8 BHP more at upper RPM than other synthetics he tested (including Royal Purple, AMSOIL, Castrol, and Valvoline). Of course oil companies constantly reengineer their products so Mobil 1 may no longer be the BHP frictional loss king.
(Message Edited 8/18/2003 2:03:27 PM)
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