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Old 10-26-2012, 11:57 PM   #17
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Quote:
Originally Posted by felixthecat View Post
What is a NOACK spec? So Pennzoil Ultra is the best, say compared to Mobil 1?
The NOACK volatility test determines the evaporative loss of engine oil at high temperatures. The lower the NOACK spec, the better, or less evaporative the oil is.

Quote:
Originally Posted by cbdallas View Post
I've switched to Pennzoil Ultra only because of the lower NOACK numbers. 6.4% vs 11% for Mobil1.
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