I use 0w30 Mobile 1, myself. Mobile 1's web page has 0w30 listed for the Cobra but not the GT?? This will be oil change 7 on the 02 so I've ran it for 18,000 not so easy occassionally bumping into the rev-limiter miles and no problems yet.
Hmmm...come to think of it, the oil could be part of that whopping 6 hp over stock I've gained along with a t-body and mufflers.
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2002 5M GT (99% stock)
1991 5M LX (30% stock)
patiently awaiting my satin silver 07 Mach 1, and don't forget the shaker
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