There are caveats to consider before upgrading to high-mileage engine oils, but if done right, the positives outweigh the negatives. Read more: 11 Best Motor Oil Brands In 2024, Ranked What car ...

While not as popular as other brands outside the U.S., Amsoil synthetic motor oil products cater ... synthetic blends, high mileage, heavy duty, small engine, and performance motor oils.

Synthetic oil ... “high mileage” conventional oils—may leave you wondering which is the best for your car, even if you’re just getting the oil changed at your local service station. Motor ...