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Old 04-17-2015, 08:36 PM   #7
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Quote:
Originally Posted by Gelbster View Post
Don't you just hate it when they specify obscure lubricants?
This link may help?
Castrol TAF-21 (Porsche synthetic transaxle oil) | ATF, Differential, Trans, Brakes, P/S | Bob Is The Oil Guy
Not really, because the Castrol TAF-X product, which is a GL-4 gear oil also sold under their "SynTorq" brand in Europe is a different product developed to address the poor low temperature shifting properties of GM and Chrysler products, and which is available in the US exclusively under GM & Chrysler product part numbers. While it is an interesting low temperature gear oil, completely water-white in appearance, and is also used widely in Nissan products, the Castrol TAF-X carries the API GL-4 rating which means it is still different than the Porsche oil which does not fit in any GL category. Even Mobil 1 once commented that the Porsche five speed gear oil was so unique and represented such a small market segment, that they had nothing even close to matching it and would not be developing anything suitable.
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Last edited by JFP in PA; 04-17-2015 at 08:57 PM.
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