As cars become commonplace in households, the question of whether to add engine break-in oil to a new vehicle has long been a ...

Although most engine oil and gasoline varieties work fine on their own, sometimes they could use a little help with an additive.

Breaking in a car's engine properly can save you lots of headaches down the road. But how to break it in can vary widely depending on what you're driving.

Semi-trucks may need an oil change every 25,000 miles. That interval may vary depending on such factors as the type of fuel and the kind of load a truck tows.

Wondering if rotary engines need oil changes? Learn how their lubrication works and why regular oil maintenance is still essential.