they cost more than comparable synthetic motor oils. For instance, five quarts of Mobil 1 Extended Performance 5W-30 High ...

The automotive world is constantly evolving, and so is the motor oil that keeps our engines alive and running smoothly.The ...

O'Reilly's list of in-house products now includes a line of synthetic and conventional motor oils, which directly compete with the big names in the motor oil game, like Mobil ... 5W-20 and 5W-30 ...