Pennzoil produces a range of conventional motor oils, synthetic blends, and full-synthetic oils, such as its Ultra Platinum, High Mileage, and Platinum Euro lines. Havoline is a motor oil company ...

If your mechanic recommends a high-mileage motor oil, how do you know when it's worth it to upgrade? And what are the pros ...

When shopping for and researching the best possible oil for your car, two options will likely come up a number of times: ...