changed to 5W-40, what a difference!
09-18-2005, 06:52 PM
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changed to 5W-40, what a difference! i just changed from M1 10W-30 to M1 5W-40 and what a difference! My oil pressure stays steady between 50-60 psi. When i ran 10W-30, my pressure would go below 40 psi on hot days. Thanks again Patman!
