Castrol is another huge name in the motor oil business. The company was purchased by BP in 2002, and like Shell, BP is one of the biggest oil companies on Earth. Thus, it is fair to assume that they know a thing or two about oil. The brand has two high-mileage oil variants. They are Castrol Edge High Mileage and Castrol GTX High Mileage. Of the two, Castrol claims more performance benefits with the Edge variant than the GTX variant. Despite that, Castrol claims that the GTX is the most popular among DIY consumers.
Both types of oil boast many of the same benefits, including seal conditioners, improved temperature performance, anti-wear protection, and a reduction of oil burn-off. Castrol’s claim to fame is its Phosphorus Replacement Technology, which Castrol says will help extend the life of your emissions systems. While few technical reviews are available, a lot of folks recommend Castrol due to its price, availability, and reputation. Online reviews agree, with few negative reviews online for either type of motor oil. We checked with Fakespot as well, and the reviews are mostly legitimate.
Castrol GTX comes in 5W-20, 5W-30, 10W-30, 10W-40, and 20W-50. Meanwhile, Castrol Edge comes in 0W-20, 5W-20, 5W-30, 10W-30, and 10W-40. Between the two brands, that should cover most vehicles on the road today. Folks with GM vehicles should use Castrol Edge, as the brand is GM dexos1 approved for GM vehicle use.
