As engines rack up the miles, they start to wear down. That’s why carmakers often recommend switching to a higher-mileage motor oil. These oils are formulated with special additives that help protect aging engines by combating sludge buildup and oil burnoff.
The most important thing you can do for your high-mileage engine is to change the oil regularly. So, if you’re looking for the best motor oil for high mileage engines, look no further than your owner’s manual. Chances are, it will recommend an oil with a higher viscosity rating, such as 5W-30 or 10W-30.
These oils flow more slowly than lower viscosity oils when cold and provide better protection at high temperatures. They also contain additives that help seal worn engine internals and prevent leaks.