What engine oil weight should I use in a GM engine with 160,000 miles?

If your car calls for 5W-30 and you've noticed no appreciable oil consumption, stick with the factory recommendation. I wish you'd have included the year, make and model to me perfectly accurate as far as 5W-30. If you have any question which viscosity to use, go to the mobil1 website and near the top there will be a box to fill in all the criteria about your car. Follow all the questions to the end and it will mirror the factory advised GM viscosity.





With out a doubt you'll get some other views on this but the recommended viscosity will allow your oil pump to pressurize critical frictional surfaces with more volume of oil faster in all temperatures. Cold start-up's is where 80% of engine wear occurs. It's to your advantage to use light weight oil. Low viscosity oil actually cools frictional surfaces faster and more efficiently than heavier oil. You'll also realize more horsepower using the correct viscosity as the oil pump works easier.What engine oil weight should I use in a GM engine with 160,000 miles?
Most post 1995 gas engines specified 5W-30 oil. If you keep to recommended change intervals, virtually any SAE approved oil will do, don't get hung up on brands. What engine oil weight should I use in a GM engine with 160,000 miles?
depends on how you drive it now since its about to get cold i would use 10w-40 and when it gets hot 20w-50 its what i run in all my cars, but 10-30 will do
Probably 10W30. Check your owners manual for sure, or the dealership near you.