This decomposition takes place even faster when the engine is exposed to extreme conditions, which reduces the oil's ability to protect the components. On the other hand, synthetic engine oils are ...

Synthetic oil used to be something only ... lead technician at CR’s Auto Test Center. “It may read a little low if the engine is still warm, but the important thing is that the level reads ...

While conventional oil typically needs to be replaced every 3,000 to 5,000 miles, synthetic oil can often last up to 10,000 miles or more, depending on your car and driving habits.

Amazingly, all that’s protecting the moving parts inside an engine is a thin ... Lastly, oil inhibits corrosion. Dinosaur juice – or its modern synthetic counterparts – prevents ferrous ...