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Old 03-30-2015, 07:22 PM
Morris Morris is offline
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Join Date: Dec 2003
Location: Gurnee, IL
Cobra Make, Engine: Kirkham #259
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Quote:
Originally Posted by zrayr View Post
I do use Mobil 1 0w-40 in the winter, resulting in zero difference in oil
Pressure vs. the Mobil 1 15w-50 the rest of the year

Z
You might want to try Mobil 1 5w50 in the summer or we use Mobil 1 racing 0w50 in KMP259 all of the time, very high in ZDDP.
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