The main function of motor engine oils is to lubricate the car engine parts. See how Shell Helix oil works inside your engine.
Main content | back to top
How car motor oil works
Learn how Shell Helix engine oils work and their importance when maintaining a healthy car. See how easy it is to check your oil, and then explore our FAQ section for our expert help, including advice on car engine oil types.
Use this car engine oil guide to unlock our knowledge on checking and changing your oil, and maintaining your battery. You can also discover what sights, sounds and smells to look out for with your car.