Why is changing oil so expensive?
This is due to improvements in engine design and onboard technology. Not only is the high-grade synthetic oil more expensive, but more of it has to be used to properly keep the vehicle maintained.
Is Expensive oil really better?
In other words, findings suggest an expensive oil may not provide any additional benefit to the helping an engine last longer, despite additives. “When you look at the chemical breakdown of each of these oils, there’s very, very little difference between them.