Quote:
Originally Posted by JFP in PA
Porsche likes to use full synthetic gear oils that are manufactured to their specifications, which have no API ratings such as Gl-4 as they have never been tested under API/SAE. The oil in the five speed was produced by a Shell subsidiary called “Burma ”, and is unique apparently due to the type of alloy used for the synchronizer rings used in the transmission. The six speed uses a different lube, but again one made for Porsche. Several years ago, we contacted all the major gear oil manufacturers to see is anyone had something comparable, only to be told that they “might have something that could work, but the gear lubricants Porsche uses are unique and we cannot be sure they will work”. And as the lubes are made exclusively for Porsche, you cannot find them anywhere else, and because the Porsche gear oil market is so small, the big company’s are not going to get into competition with Porsche.
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Thank you - I really appreciate the comments and sharing your knowledge and experience. You probably don’t remember but I bought my Boxster for cheap with an overheating issue about three years ago and you helped me to diagnose and fix the problem. I probably wouldn’t be driving and enjoying it today without your past help
