Regular or Synthetic Oil? How to Keep Your Car Hydrated

If you’re not sure which kind of oil to choose, browse Groupon’s rundown of the three main options.

Motor oil is integral to your engine’s performance—it keeps parts moving friction-free, prevents the engine’s temperature from getting too high, and cleans the engine as it circulates. After so many miles on the road, however, oil breaks down. When this happens, it’s up to you to choose the type of motor oil you want to refresh your engine.