A premium conventional motor oil that has been around since the late 1960s, Castrol GTX is our top pick ... this oil contains high levels of ZDDP (Zinc) that is necessary to protect flat tappet ...

These oils all feature specialized formulations for their specific applications; for example, Lucas Oil's Hot Rod and Classic Car Motor Oil is fortified with zinc, molybdenum, and phosphorus ...

All major positives, without a doubt. That's why we've brought together five major motor oil brands that are manufactured in the United States. From Castrol to Valvoline and every one in between ...

If you’ve got a more modern car, feed it synthetic motor oil for its entire life to avoid issues with its more complex engine down the line. You can choose between Castrol EDGE and GTX Full ...