Recent content by gdrum

Originally Posted By: SteveSRT8 I would carefully evaluate the 30w offerings but definitely consider a 40w if they do not curtail consumption. We run M1 0w-40 in all our higher mileage fleet vans and Silverados, many of which have the exact engine you do. Works well for us. Just wondering...

What are some good oil options for a 5.3L Vortec in a 2001 Yukon that has 160k. No valvetrain noise. It will be driven in Colorado Rockies only. Literally from airport downshifting and reving high all way up and down the mountains and back to the airport. Last year we drove it on 10-20 degree...