Where is current list for GM4718M ?

Joined
Oct 3, 2008
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 Originally Posted By: Eddie
Interesting that no 5w20 are listed
GM hasn't gotten on the gas mileage over engine protection train yet.
 
Joined
Jul 6, 2004
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Houston, TX
The Castrol EDGE bottles also have the GM4718M listing on the bottles as well, putting it in my buddy's "new" '92 vette tomorrow morning...UOA to come.
 
Joined
Jun 17, 2005
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Billings, MT
 Originally Posted By: Eddie
Interesting that no 5w20 are listed
Thicker oil does just fine with in-block cams. Overhead cams seem to be the ones that a thinner oil works best with.
 
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