Oils of different brands, especially high-end brands, are more and more compatible with other oils, so changing different brands of oil does not require cleaning engine.
Put old motor oil as clean as possible. The specific method is as follows:
Put old engine oil clean. When draining engine oil, ask technician to blow high pressure air into oil filler hole, try to blow out old oil residue from oil pan, add a small amount of new engine oil, for example, add 1/3 of new engine oil Engine oil , drain it after idling about 30 seconds; add new engine oil;
If you change to a different type of engine oil, it is recommended to clean engine because composition of mineral engine oil and full synthetic engine oil are different.
If you only rely on engine oil, there is still some old engine oil left on cylinder walls and various parts inside engine.
In this way, cleaning engine can effectively clean engine oil left on cylinder wall and various parts inside engine, so that when engine oil type is changed, old engine oil will be cleaned. Thus, impact on newly added fully synthetic motor oil is negligible.
Generally speaking, when changing from mineral oil to mineral oil, there is no need to clean; just follow steps. To paraphrase netizens, how can a machine be as delicate as we are, eat rice at noon and noodles at night, gastric lavage? As long as oil is good and filter is good.
Cleaning engine, as a rule, consists in cleaning engine of sludge. Use kerosene or a related diluted oil to dissolve sludge and release it. There is no need to clean it when changing engine oil of different brands. Although brands are different, type must be same, so there is no need to change it. Flush engine with branded oil.