2020年7月9日

Engine wear

The famous American engineer Robert Sikorsky listed five major causes of engine wear in his book "Always Driving It":
After the combustion of fuel in the engine combustion chamber, a lot of harmful substances will be produced.
Generally, 1-5 pounds of nitrogen and sulfuric acid will be produced per 100 gallons of gasoline. These substances will not only cause corrosion to the cylinder, but also rush into the engine through three piston rings (top, middle and bottom rings)