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Jeesh these "oil" hand wringing wonderments go on and on and...
The net stuff I peruse on the various brands/viscosities, etc.
all seem to offer up some conflicting opins. Most of the data
is inane, imo, for normal driving conditions, and much of the
comparison data seems to vary depending upon the test/"expert"
opin site. It can really make one's hair hurt after awhile...
Many here run the 5W-30 of some synth brand. Some of us run
0W-40 as it seems to offer exc. cold start and that higher warm/hot
running top number.
Chicago is not Africa or Barrow, AK; I think either would be fine.
It's an oil/filter change in a car that is rarely, if ever, pushed to its
limit, engine-wise. I'd worry about other stuff; oil "quality", one oil
"viscosity vs another", "which brand", and "3k mile changes" are no
longer high on my list of concerns.
GL,mD
__________________
Ol'UncleMotor
From the Home Base of Pro Bono Punditry
and 50 Cent Opins...

Last edited by motordavid : 08-29-2008 at 09:46 PM.
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