5W-30, 10W-30, or 5W-20? Conventional versus synthetic motor oil? And what's the difference? Which oil is best for high mileage engines in winter? Which oil is best for your car and your geographic location? Why is viscosity important? We teamed up with Gears and Gasoline to learn more about motor oil while answering these questions.
What type of oil do you prefer to use? Do you make sure to follow your vehicle manufacturer's recommendations?