Top 10 Peak Motor Oils
for June 2023

It's a no-frills high-performance synthetic oil, just as good as the competition's more expensive oils. And it's cheaper than all of them.

Our inexpensive engine oil deserves to be as popular among racing fans as Truex's, with a synthetic blend designed for engines that must withstand extreme loads.

Mobil 1 synthetic motor oil earned a slightly lower score than the Mobil 1 synthetic motor oil tested in 2015, but it's still our top pick.

This oil is ideal for high-performance engines where engine wear is a major concern, such as the BMW M4 and Ford Mustang GT.

The Valvoline full synthetic high mileage oil does what it claims. It reduced deposits, reduced engine wear, and lowered oil consumption, but the extra detergents and additives made it the most expensive oil we tested.

A full synthetic oil with an API SG (Superior, Group) rating that noticeably improves fuel economy in demanding driving situations.

This small bottle of oil is priced like a premium product, but it performs surprisingly well and lasts much longer than the competition. It has good cold-weather starting and stays in tune longer than most of its competitors.

Royal Purple 51530 High Performance Motor Oil is one of the best premium-grade oils we've tested, and it's the only one that passes all five of the tests we use to evaluate motor oil. You won't get much better than that.

Valvoline provided the best value/quality. After just 10,000 miles, GMII Jasper Engines tested oil in an engine that needed a new $700 part.

This full synthetic oil did well in our testing, and it handles heat well. We're fans of Kendall's heavy-duty synthetic blend, but it's pricier than most of the oil we tried.