i drive my car pretty hard and i was wondering what oil i should use? this will be my second oil change. i got 3500 miles now. should i use synthetic? what kind? 5w? 10w? 15w? 20,30,40,50? need help please
5W30 is rated at 5 viscosity at 30 degrees whereas 5W20 is 5 viscosity down to 20 degrees. Big difference in colder climates. In the summer, it's a different story. You can go with a higher temp rating, but would still need the 5 viscosity to insure the top end gets oil quickly on start-up.
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