The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

**WorkinLonghorn** · 10-04-2007, 07:05 PM

I don't know what part of Washington you are in but if you are in the colder regions that would be OK for winter use.Frankly though I'd go with 10-30,or 10-40. Here in So.Cal.we have such mild winters,I just use 10-30 Mobil-1 all year. With a high mileage engine or when I expect to do a lot of desert driving (120+) I tend to go thicker and use 20-50 (Castrol).

10-04-2007, 07:05 PM	#4
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,887	Re: oil question I don't know what part of Washington you are in but if you are in the colder regions that would be OK for winter use.Frankly though I'd go with 10-30,or 10-40. Here in So.Cal.we have such mild winters,I just use 10-30 Mobil-1 all year. With a high mileage engine or when I expect to do a lot of desert driving (120+) I tend to go thicker and use 20-50 (Castrol). __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme.