An engine oil leak is one of those vehicle problems that often begins quietly and ends expensively. A few drops under the car today can turn into serious engine damage tomorrow if ignored.

A pro explains how to change your oil at home in under an hour.

Can stuck piston rings be restored without teardown? A 500,000-mile Valvoline engine test shows how deposit removal may ...

Diesel engines in trucks and some passenger vehicles can derate power and go into limp mode, and this can be caused by a ...

TALLADEGA, Ala. -- Corey Day claimed the first NASCAR O'Reilly Auto Parts Series victory of his career on Saturday, driving ...