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Old 05-13-2021, 09:07 PM   #7
BigBird05
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Join Date: Aug 2019
Location: Cheraw
Posts: 1,300
Re: smoke out of the beather

During an oil comparison test it was determined that 10w40 caused rings to stick. This test was run by Oldsmobile Engineering. I worked there. So after that they recommended that you stop using 10w40 oil. I haven't run it since then. Now all of you people that swear by 10w40 can tell me that its great for your engine.
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