Let’s explain all of those confusing numbers, letters and terms to help you choose the right oil for your car.

Besides the environmental benefits, motor oil can be reused. It is re-refined, processed into fuel, or recycled to make other petroleum-based products. Everything from lubricants, like gear oil ...

Well before 1939, this was indeed the case until Valvoline invented the all-purpose X-18 single-grade ... additives, gear oils, and oil filters. Royal Purple's motor oils, most of which are ...