Re: Engie oil
I have run 10w30 since I built my engine some 30 years ago. Usually whatever was on sale. Probably at least 70,000 miles on the engine. Had occasion to tear my engine down and it is as clean inside as when I built it. I credit modern oil, 180* thermostats and full flow oil filter. There was absolutely no wear on the crank, like new bearings, no ridge in the bores.
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