07 Z and Oil?
05-09-2007, 06:46 AM
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Originally Posted by G35_TX
Try switching from Royal Purple to something better like Amsoil. RP has already shown to not be very good past 3k and burns off more. BITOG has all this info. RP also is overated. Mobil 1 protects better than RP and M1 isn't as good as it use to be.
Amsoil FTW!!
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