Thread: Oil Level Light
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Old 09-09-2001, 09:42 AM
loubapache loubapache is offline
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Join Date: Jul 2001
Location: Western Michigan
Posts: 1,080
I think I heard at Cartalk (could be somewhere else) once that mixing oil grade is OK. I tried to find it in their archives this morning but could not.

They even said the viscosity index is a pretty linear scale. In another word, if you mix 1 qt of 5W30 with 1 qt of 15W50, you get 10W40.

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