All marking and classification of gear oils
The SAE divides the viscosity of the gear oils into seven grades:70W 75W 80W 85W 90140250As with engine oil, take W for winter gear oil, and without W for summer gear oil.70W oil adapted to a minimum temperature of -45 degrees c;75W oil adapted to a minimum temperature of -40 degrees c;80W oil adapted to a minimum temperature of -26 degrees c;85W oil adapted to a minimum temperature of -12 degrees C.Generally speaking, 90 of the temperature should not be more than 35 degrees Celsius, summer temperatures often exceed 35 degrees Celsius area, should choose 140 is appropriate, mainly in China's subtropical and tropical areas.No. 250 is mainly used in equatorial countries.Similar to engine oil, gear oils are also classified into single - grade oils and multi - grade oils.
GL-4 and GL-5 are also called hyperbolic gear oils.GL-4 is mainly used in manual transmission and on front and rear axles of medium, light and medium speed vehicles;GL-5 is mainly used on the front and rear axles of heavy loads and high speed cars.GL-5 can take the place of GL-4. Of course, the cost is much higher than GL-4.
Gear oilAPI divides the car gear oil into two grades, namely GL-4 and GL-5. GL-1, GL-2, and GL-3 have long been eliminated. But GL-3 gear oil still has a large market share in the market of our country.GL-4 and GL-5 are also called hyperbolic gear oils.
