The most serious mechanical failure of an engine is "burning tiles and holding the shaft". Although the causes are different, the fundamental result is severe dry wear between the engine crankshaft and the large and small tiles due to the lack of oil film protection
Compared to the past, oil consumption has increased now. When some customers used relatively cheap oil and now switch to high-quality oil, they may complain that oil consumption has increased compared to the past.
After changing the engine oil, there is often a phenomenon of oil "loss" after a period of operation, because the oil cannot fully fill every gap of the engine when it is first added
Oxidation is determined by temperature, time, the performance of the base oil and antioxidant additives. Therefore, oxidation requires a certain amount of time, and generally speaking, the color of engine oil will not quickly darken or turn black due to oxidation