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Old 05-19-2009, 12:16 AM   #11 (permalink)
Join Date: Jan 2009
Location: Cypress Ca
Posts: 69
Drives: 300ZXTT, 350Z, 200SX
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smartbomb is on a distinguished road

I know that Cosworth has tested royal purple and found it to be one of the best oils, but that was over 12 years ago. Mobil One 0w40 only is a very good oil. The 0w40 is better than the other grades and is the factory fill for the GT-R.
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