Hot Shot’s Secret® now offers its newly introduced Red Diamond™ Ultimate fully synthetic passenger car motor oil in a convenient 5 qt. easy pour container. Our dealers were very excited to have a ...

Once upon a time, synthetic engine lubricants were considered exotic and used in only the most rarified performance engines. In fact, one of the companies discussed here, AMSOIL, was the first company ...

We may receive a commission on purchases made from links. Synthetic motor oils have been around for a while now, longer than most gearheads realize. The first synthetic hydrocarbon oils were created ...

Regular oil changes are important for keeping your Harley-Davidson motorcycle running smoothly. Waiting too long can cause the oil to become dirty or degrade, which can in turn lead to potentially ...

One of the most common car-care questions is also one of the most confusing: what kind of motor oil do you really need—and is synthetic worth the extra cost? Motor oil keeps your engine lubricated, ...

Craig has worked in automotive media for nearly 20 years, producing content for publications ranging from Autoline and AutoGuide to Roadshow by CNET and EV Pulse. Aside from writing, he’s also ...