Automakers design their engines separately from each ... For instance, the oil cap on my Range Rover says, "Castrol ...

The tech also allows Castrol to create specific oil blends to match to different engines. "Today, you can't guarantee the right oil will be used, so the degree to which oils can be tailored is ...

Modern engines are smaller and more efficient without ... as synthetic blends and more affordable conventional motor oil. The Castrol EDGE line of fully synthetic motor oils sold in the U.S ...