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JFairman JFairman is offline
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Join Date: Jul 2006
Location: S. Florida
Posts: 7,289
You're recalling incorrectly.

Mobil one is synthetic and always has been.
There are 2 different formulations of the 15w-50. The regular one is good for 911 motors and the "extended perfomance" one is not good for 2 valve head 911 motors. It's for 4 valve head water cooled motors with catalytic converters.

There is also Mobil One 20w-50 for air cooled motorcycles. It has the most ZDDP in it and it's the best.
Walmart has the lowest price on it I've seen.
Old 06-17-2013, 07:17 PM
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