Why is engine oil used in an engine?

The journey of oil around a car engine takes as little as five seconds. In this time it protects critical engine parts, preventing damage. This short film take us on this incredible journey, truly demonstrating oil in action. For more information, please visit www.castrol.com. read more

I have used Rotella synthetic 10W30 and 5W40 in these engines and know to avoid oil that might be way too thick. I figure these are harder working engines that operate in dirtier and hotter conditions that more approximate a diesel engine. read more

Use. Motor oil is a lubricant used in internal combustion engines, which power cars, motorcycles, lawnmowers, engine-generators, and many other machines. In engines, there are parts which move against each other, and the friction wastes otherwise useful power by converting the kinetic energy to heat. read more

Engine, or motor, oil is designed to lubricate the inner components of internal combustion engines, as well as to protect them against corrosion and keep them cool while in use. It’s made from two main elements: base stock and additives. read more