mobil 1 0w40
10-18-2007, 06:38 PM
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mobil 1 0w40 Hey guys. cant find my normal 10w40 mobil1 synthetic anywhere so last oil change i put 10w30 synthetic. can we run 0w40 synthetic in our ls1`s? 01 SS with 62k miles
10-18-2007, 07:20 PM
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I've been using nothing but M1 0w40 for about two years now in my '98 LS1. I switched from the M1 10w30. I've been much happier with the 0w40, and have no problems to report.
10-18-2007, 08:08 PM
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I run nothing but Mobil 1 0w40 in both my 2000 Z28 and my 2005 GTO. I read somewhere about oil analysis performed on LS engines showed the least amount of wear in harsh operating conditions using the German grade Castrol synthetic 0w30. I have always just used the Mobil 1 0w40 since it is easier to find locally and I have read that the Mobil 1 products run a little thinner, hence the 0w40 instead of 0w30.
