ADD : 32, Jalan 30/70a, Desa Sri Hartamas, 50480 Kuala Lumpur, Wilayah Persekutuan Kuala Lumpur Order of engine oil change (This is the actual order.) (1) Removal of residual drain oil (2) Double removal of residual oil (3) Flushing (cleaning) (4) Replace air cleaner/oil filter/air conditioner filter (5) Replenish washer fluid/replenish tire air pressure (6) Refueling with engine oil (7) Inspection of other vehicle consumables (8) Engine cleaning and finishing First, it is to discharge dirty oil by floating the vehicle on a lift, and this process is called drain. In the case of the Audi A3, it took about 10 minutes while the residual oil was removed because 4 to 5 liters of oil were used. (2) Even after the drain is finished, oil still inevitably remains inside, so it goes into the process of removing residual oil. After that, clean the filter house and replace the washer and O-ring. (3) Proceed to the step of replacing consumables. Always replace the air cleaner and oil filter as a set each time the engine oil is changed. (If you don't replace it on time and just ride it, impurities will enter the engine and the vehicle will be ruined.) (4) Tire air pressure / washer fluid is replenished free of charge while changing consumables. (5) Enter engine oil refueling in earnest. Castrol Edge 5w30 was used. For the members reading this article, I would like to briefly explain how to distinguish oil. City driving, commuting = 5W30 High-speed driving, highway driving = 5W40 You can look at it like this. 5w40 has strong engine output, and this is not a realistic explanation.) Now, carefully pour it into the hopper. The vehicle contains about 4L, so pour all 4 bottles. After refueling to the end, check the gauge to see if refueling has been completed normally. The work was completed after checking the consumables of the last vehicle and checking the overall condition of the vehicle.