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"What is your
understanding of the automotive experience with the
multi-viscosity oils
??? Regards, George"
George, the
multi-vis oils are/were a necessity for fuel economy ratings and cold starts
(below 0 deg F).
They are not so
good for WOT testing. All max load and valve train tests were run on straight
30w oil. Oil consumption and engine durability all improve with straight
weight oil. I might add I have not seen tests run with the new synthetics such
as Mobile 1. With that said, I just put the new "Purple ??" synthetic oil in my
new truck. But my truck sees <10% power 90% of the time. In 1987 I
left GM and started a company manufacturing aerospace parts. My wife calls
it my momentary loss of sanity. Oh, I do like the LS1 a lot...I just
finished a customized '72 Chevy truck with the LS1 and 4L60E trans....very nice
and very fast. My youngest son's project with dad.
Craig
Berland
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