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Does 10W-30 Provide Better Protection for Corvettes?
Ask Your Stickiest Question. . . Ask Your Stickiest Question. . . Or ask us something you’ve always wanted to know about using our products. We’ll sort through all the submissions and present the best questions to our automotive experts. We'll share the questions and their answers here.
Does 10W-30 Provide Better Protection for Corvettes?
Some experts on the forums I read are of the opinion that Mobil 1 10W-30 provides better wear protection for my C5 Corvette than the 5W-30 that GM recommends. The car is out of warranty. Which is best for my car?
-- Donald Chilton, Blairsville, GA
We recommend you stay with the OEM recommended viscosity grade, Mobil 1 5W-30. However if you prefer a slightly higher viscosity grade Mobil 1 10W-30 will provide outstanding protection as well. Keep in mind that at operating temperature both of these products provide 30 grade viscometrics and protection. The Mobil 1 5W-30 will get to the moving parts more quickly in colder climates, but this may not be a big concern for you. The Mobil 1 5W-30 may also provide slightly better fuel economy over the life of the vehicle.  
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