Per Schroeder
Per Schroeder SuperDork
6/5/12 9:53 a.m.

For most of the motoring public, picking the right oil is easy: Simply follow the manufacturer’s recommendation. No matter what the make and model, trusty engineers have already determined the right viscosity for that particular car. Whether it’s 5W30 or 10W-whatever, the information is in the all-important owner’s manual. However, you’re not John Q. Public. Those who race, run added boost, or have dramatically raised the redline of their engine may have to determine their own viscosity needs. No matter how speedy a car is in stock condition, the owner’s manual isn’t going to spec an oil for a three-hour enduro or a home-brewed turbo setup. That’s when it’s time to do a little research and testing.

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