Is your car's engine okay? These 5 behaviors spoil engine most. After reading, you feel sorry for your car.

Long downtime
Vehicle is in rich fuel injection state at idle. The likelihood of carbon deposits is higher than when driving a car or driving at high speed. If engine is idling for a long time, carbon deposits in engine will definitely be heavier. Over time, intake and exhaust efficiency will be affected, especially for models with direct fuel injection. In vehicles with direct fuel injection, which are often idle, obvious black smoke may be observed on cold start.

Turn on air conditioner
Starting with air conditioning will have a big impact on car battery and engine. When car is started, current will increase and engine will be in a high load state. It is best to turn off air conditioner every time a few minutes before turning off car so that it can also dry the air conditioner outlet.

Bad oil filter
When engine oil passes through pores of oil filter element, solid particles and sticky substances in oil accumulate in filter. If filter is clogged, oil cannot pass through filter element unhindered, and it will burst filter element or open safety valve, pass through bypass valve and still bring dirt back into lubricating part, which will accelerate engine wear and increase internal pollution. Therefore, regular replacement of oil filter element is equally important.

Intake pipe too dirty
If intake pipe is too dirty, it will reduce efficiency of intake, resulting in insufficient engine intake, insufficient combustion of gasoline and formation of carbon deposits.

Engine oil has deteriorated or too much has been added
When vehicle is driven for a certain mileage, solid particles and viscous substances in oil will degrade quality of oil. If it is not changed for a long time, oil filter element will become clogged and engine wear will increase. However, if too much oil is added, it will increase engine's internal power loss, causing more oil to splatter against cylinder wall and stop burning oil. The editors recommend changing oil on time strictly according to oil cycle, and amount of oil should not be too much or too little.