How to Check the Production Date on Great Wall Motor Oil?

[JosephRose]

Great Wall Motor Oil's production date can be checked by looking at the first six digits of the production batch number printed on the packaging box. The functions of motor oil are: 1. To separate the surfaces of relatively sliding parts, thereby reducing wear; 2. To bring heat back to the oil tank and then dissipate it into the air, helping the radiator cool the engine; 3. To circulate carbon deposits, sludge, and worn metal particles from engine parts back to the oil tank, flushing away dirt generated on the working surfaces of parts through the flow of the lubricating oil. The effects of using inferior motor oil are: gum and incompletely burned substances can accumulate on the valves, intake passages, and combustion chambers, affecting the engine's operation and causing engine damage.