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How To Replace Vehicle Gear Oil?

Oil Drain Period

 The oil drain period is not fixed according to the rate of oil degradation, working condition, industry standards, etc. Some companies adopt a regular oil change period, for hyperbolic gear oil is changed every 20000 to 25000 km. Heavy load vehicle gear oil is changed every half year to one year.

Oil Drain Indicators
 In China, an oil change standard is set for ordinary vehicle gears, SH/T4075-2003. The standard suggests a oil change mileage of 45000 km。When any indicator falls into the range of oil change values, the gear oil should be replaced.


oil change values

Test methods

Change in viscosity(100℃)%
  water content/%                   
  acidity increase/(mgKOH/g)   

 iron content/(mg/kg)      


GB/T 265
  GB/T 260
  GB/T 8030
  GB/T 8926B
  SH/T 0197

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