We encounter two same cars，The use situation is almost the same，Check that a car uses a full synthetic motor oil，Winter cold start and preheat 0.5min idle at idle speed，Mineral engine oil used in a car，You need to preheat 5min in the morning，idle speed can you drop。Later, both cars were replaced with the same full synthetic motor oil，The fuel consumption is close to。Use full synthetic engine oil，can reduce friction resistance，Improve vehicle power performance，Save fuel。For the same oil membrane requirements of frictional surface，Full synthetic engine oil can be achieved with lower viscosity，and mineral oil needs to be more viscosity than synthetic engine oil to achieve。High cost of replacing the full synthetic machine，But in the same working environment，The use period of full synthetic engine oil is much longer than mineral oil，Therefore, after comprehensive consideration of the number of oil changes，The cost of use of full synthetic engine oil is not much higher than mineral oil。

This is the main factor，If you want to save fuel, you ask foreseeable driving，Always stepping on accelerated pedal、Step on the brake pedal must not work。Step Step Accelerated Corban，The speed of the vehicle is quickly mentioned，However, some fuel will seabet loginbe discharged because it is not completely burned。Frequent braking pedal，fuel does not make the number of mileage，But it has become frictional thermal energy consumption。So you should keep the right speed driving，Try to use the brake pedal as much as possible during the driving process，Because the brake pedal is consumed the power of the engine，This will increase the fuel consumption of the vehicle 100 kilometers。

Vehicles are not as good as smooth road fuel to the road where the roads are often congested。The vehicle stopped in place for a long time，The engine is still running constantly，idle fuel consumption is not low，Equivalent to consume fuel。The most economical speed of driving is generally 60-80km/h，So the relationship between fuel consumption and road conditions is also large，If the vehicle can choose smooth roads as possible，fuel consumption will definitely drop。