Over time, conventional oils can sometimes form sludge, which can reduce your engine’s efficiency and, ultimately, reduce the life of your engine. Synthetic oils contain fewer impurities and are designed to better resist the formation of sludge, therefore maintaining their viscosity (or ability to flow) and preventing deposits from forming.

In an industry standard test measuring sludge protection and engine cleanliness, Mobil 1™ synthetic motor oil provided outstanding sludge protection.

Chrysler Sebring Test

In a test using a 2009 Chrysler Sebring that had significant sludge formation, Mobil 1 synthetic oil cleaned up virtually all engine sludge in just one oil change (4000 miles).

Engine Teardown

In a test using Mobil 1 synthetic oil in a Chevrolet Camaro SS V-8 running at 25,000 mile oil change intervals — 2-3 times longer than recommended by Chevy — there was excellent engine cleanliness and no noticeable engine wear.

Mercedes Million Kilometer Test

Imagine a car running 1 million kilometers and its engine still looking like new with minimal deposits and minimal wear. Watch what happened.