Re: The suprising truith about motor oil !

Posted by MT Mich on September 11, 2003 at 08:03:30 from (136.1.1.154):

In Reply to: The suprising truith about motor oil ! posted by GG on September 10, 2003 at 20:04:46:

I'm a powertrain engineer for one of the Big 3 (who shall remain nameless!) and there aren't really any surprises here. Auto manufacturers went to 5W30 (0W30 coming!) to reduce start up friction (engine wear and improve fuel economy, actually helped meet federal fuel economy stds.). Still functions the same at operating temps. There are many more brands of oil than makers. Ford (Motorcraft), NAPA, Murrays, insert your favorite store brand, do not make oil, they buy it repackaged from one of the few actual makers. No surprise they act similarly. So long as it meets the standards "SG" or "SH", it MEETS the standards. Most of these oils will go 10,000 miles easily under normal conditions (warms up enough to dry it out and normal dust conditions). Most manufacturers suggest 5,000 under normal conditions simply because surveys said most people were changing it then anyway, and it's a nice round number to keep track of!

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