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Which Gear Oil Brand is Best for Porsches with Limited Slip Transaxles?
 
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Question:
Which Gear Oil Brand is Best for Porsches with Limited Slip Transaxles?
For Porsches with limited slip transaxles, I've heard that Mobil 1 Synthetic Gear Lube LS 75W-90 is too slippery for the synchros and that Mobil Delvac Synthetic Gear Oil 75W-90 is the preferred lube. What's your opinion?
-- Stan Simm, Winston-Salem, NC
Answer:
Mobil 1™ Synthetic Gear Lube LS is specifically designed for limited slip differentials. It contains a nominal amount of friction modifier to satisfy the needs of many applications. Mobil Delvac™ Synthetic Gear Oil 75W-90 is not a limited slip gear oil.
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