Used car with no owner's manual and no idea what motor oil grade to use, or just wanting to know which motor oil is best for ...

When the correct oil is used at the proper frequency, it keeps the car running smoothly while extending the life of the engine. Thus, using the correct oil for your vehicle is essential ... driving ...

Car maintenance is an ... of the alternative engine oil between scheduled service intervals." Why not? The wrong type can ...

CR’s experts explain how oil works, when to check oil, and what's the right oil to choose By Benjamin Preston If you’re the diligent type who checks your engine ... you wondering which is the best for ...