Re: O.T. 15W40

Posted by Ron on June 07, 2004 at 22:56:30 from (69.179.2.158):

In Reply to: O.T. 15W40 posted by rustyfarmall on June 07, 2004 at 19:21:47:

It's a common misconception that heavier oil is somehow "better" than light oil. Actually the opposite is true. The reason is that 90% of all engine wear occurs in the first few seconds of a cold (dry) start... the time between when you turn the key and full oil pressure is acheived. Thinner oils lubricate faster. The actual protection of bearings and bearing surfaces in an engine comes from the film strength of the oil, not its weight.

Also, as others have learned, GM will not honor any warranty where the oil weight recommendation was violated and it caused a problem.

If you want your engine to last a long time, use synthetic oil in the proper weight range and change it and the filter per the manufacturers recommended intervals.

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• Re: Re: O.T. 15W40 Redman 13:39:49 06/08/04 (0)

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