What oil viscosity should I use in my car? It has about 35000 miles on it and I live in a cold climate. However, the car is stored in the winter. I've been hearing a lot about how 20w50 can add more protection, but have been hearing many different opinions. Which do you think is best for my Mustang which is driven in temperatures from 37 to 90 degrees.
Dec 22, 2008 at 2:11 PM