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Re: motor oils
The owners manuals, as far as I can remember, have a graph with oil weight recommendations for the climate the vehicle will be operated in. The lowest number to be used in the coldest temps for easier cold temp lubrication. I don't think I've ever seen a zero recommendation.
As far as my old 315,000 miles Tahoe is concerned, I have used 10w30 in it for 12 years and now with the high miles it does use a couple qts between changes. I am thinking a 20w50 might be a good one to use. Might even use a bit less oil too.
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Boog
69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver
primer is finer
91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said.
I stand for the flag and kneel at the cross
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