United Kingdom & Ireland
Lower viscosity engine oil for better fuel economy

Lower viscosity engine oil for better fuel economy

Low viscosity synthetic engine oil flows through the engine faster to get to where it’s needed more quickly, generating less friction than conventional mineral oil so the engine operates more efficiently.

Modern car engines are between 15 and 20% efficient, losing up to 85% of the fuel’s energy to friction within the engine, rolling resistance from the wheels, braking and the gearbox. Friction losses inside the engine are one of the largest consumers of energy and synthetic oil reduces these losses. The less energy consumed by friction and dissipated as heat, the more can be used to drive the wheels. Fully synthetic oil, such as Mobil 1, makes each litre of fuel last longer, cutting your costs.

12 helpful tips to improve your fuel economy


Driving style

1. Drive smoothly - Accelerate gradually and read the road ahead to avoid unnecessary braking.
2. Switch it off - Avoid running the engine for a sustained period of time while stationary.
3. Go easy on the brakes - Frequent and abrupt braking will lead to increased fuel consumption, rapid brake pad wear, and may damage the brake system.
4. Avoid coasting - To slow down, release the gas pedal, but do not shift into neutral. Use engine braking instead of coasting and normal braking. Never coast in neutral; idling uses more fuel than running in gear on a closed throttle.
5. Use the handbrake - Don’t hold the vehicle on a slope using the clutch pedal and gas, use the handbrake instead.
6. Plan your journey - Use motorways and free-flowing roads wherever possible; a car is most fuel-efficient at a steady speed.

Vehicle condition

1. Check your tyre pressures - Under-inflated tyres have increased contact with the road surface, creating excess friction which the engine will have to work harder to overcome.
2. Check your wheel alignment - Badly-aligned wheels have a similar effect on fuel consumption to under-inflated tyres because they increase friction, making the engine work harder.
3. Lighten the load - Remove anything from the car that you don’t need. Every 50 kg of weight can increase fuel consumption by about 2%.
4. Reduce the drag - Keep windows and the sunroof closed. Roof-racks and boxes also add wind resistance and so increase fuel consumption. If you don't need it take it off – if you do, pack carefully to reduce drag.
5. Check the air filter - If it’s dirty and old, it will restrict the engine’s ability to breathe which will make it work harder and use more fuel. Changing a filter is simple and cheap.
6. Use a fully-synthetic oil - Mobil 1 can be used in all cars, and is available in different grades for use in higher-mileage engines and extreme conditions. 

Learn about Mobil 1™


Mobil 1™ engine oils

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