Motor oil has quietly become one of the most important choices car owners make, especially as vehicles routinely cross ...

Even for major gearheads, choosing the right oil for your car can cause many headaches, so if manufacturer specifications and the multitude of brands weren’t enough, we now have an influx of high ...

Jeff Smith of Roadkill Garage pours in some Castrol Edge High Mileage oil into a 318 engine that could use it.

High-mileage oil isn't some secret elixir reserved for 20-year-old Honda Civics with a mystery stain on the headliner and 3.5 working speakers. It's real. And it serves a purpose — mainly for engines ...