Originally Posted By: userfriendly
I came up with the notion that an engine when shut off hot in the winter, then cooled to a very low temperature overnight experiences acid and water condensation on engine parts, causing microscopic rust to form on the cylinder walls and maybe aluminum oxide from blocks and cylinder heads.
+1
I agree with this notion as valid .......
which I believe, this phenomenon of increased corrosion wear in low temperature winter seasons .........
had been fully exploited stealthily in Bitog numerically demonstrating a TGMO 0W20 oil used over a "1 winter and 2 summer seasons" period as producing lower metal wear ppm than an M1 0W40 oil used over a "2 winter and 1 summer seasons" period .......
inferring (to my perception) that a thinner xW20 viscosity grade oil as producing lower adhesion and abrasion wear ppm than a thicker xW40 viscosity grade........
conveniently ignoring the phenomenon of corrosion wear vis-a-vis adhesion and abrasion wear.
I came up with the notion that an engine when shut off hot in the winter, then cooled to a very low temperature overnight experiences acid and water condensation on engine parts, causing microscopic rust to form on the cylinder walls and maybe aluminum oxide from blocks and cylinder heads.
+1
I agree with this notion as valid .......
which I believe, this phenomenon of increased corrosion wear in low temperature winter seasons .........
had been fully exploited stealthily in Bitog numerically demonstrating a TGMO 0W20 oil used over a "1 winter and 2 summer seasons" period as producing lower metal wear ppm than an M1 0W40 oil used over a "2 winter and 1 summer seasons" period .......
inferring (to my perception) that a thinner xW20 viscosity grade oil as producing lower adhesion and abrasion wear ppm than a thicker xW40 viscosity grade........
conveniently ignoring the phenomenon of corrosion wear vis-a-vis adhesion and abrasion wear.
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