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Mobil 1™ keeps engines running clean

Over time, the use of conventional oils or lax maintenance practices can cause sludge to form, which reduces your engine’s efficiency and, ultimately, its life.

  • Engine after one oil change with Mobil 1™ oil

    Engine after one oil change with Mobil 1™

  • Engine with significant sludge formation

    Engine with significant sludge formation

Mobil 1 advanced full synthetic motor oils contain fewer impurities than conventional oils. That means they’re designed to better resist the formation of sludge, maintain their viscosity and ability to flow, and prevent deposits from forming.

We’re constantly testing our motor oils to substantiate their ability to keep engines clean, and the ability to resist sludge formation is always a report-out item. Engine cleanliness is documented in these tests shared online:

Product Testing Results
Mobil 1 Extended Performance High Mileage
  • Testing in a used 2009 Honda Accord EX-L; see the top deck photos at the start and end of the 120,000-mile test with 15K-mile oil change intervals.
Mobil 1 Truck & SUV
  • Testing in a 2018 Ford F-150; see the before and end of test sludge ratings.
Mobil 1
  • Testing with the Lucky Cab taxi fleet in Las Vegas. Watch a live engine teardown of a Chevy Impala V6 engine including a look at the valve deck and rocker arms.

Mobil 1 Annual Protection
  • Testing in three makes/models. See the photos of the top deck of a 2015 Lexus NX 200t, 2.0 L Turbo after 120,000 miles with 20K-mile oil change intervals.
  • Testing in a 2015 Chevrolet Silverado 1500 after 520,000 miles with 20K-mile oil change intervals. Watch the video as we invite a mechanic to witness engine condition.
  • Road trip testing of a Chevrolet Equinox SUV and a Ford Fusion sedan each driven 20,000 miles on a single oil change. See the before and end of test sludge ratings and valve cover photos of both engines.

Not all synthetics are equal
Do you know that Mobil 1 synthetic oils are made of precisely engineered base stocks designed for performance and protection – even under tough conditions?

Find out about the science behind Mobil 1™ synthetic oils – and what sets them apart from the competition.