So when the car comes to a minor fault, which in no way affects the ride comfort, usually we ignore it.Of course, much it depends on where there was such a small failure and whether it affects the operation of other mechanisms or systems in the car. But keep in mind that even a small problem can lead to much bigger problems.
It happens that neglected for a long time fault can lead to more serious damage.As a result, rather than pay less for parts and replace them, we have to bear higher costs related to the comprehensive service.
An example is lubricating oil for four-stroke or four-cycle internal combustion engines such as those used in portable electricity generators and "walk behind" lawn mowers.Another example is two-stroke oil for lubrication of two-stroke or two-cycle internal combustion engines found in snow blowers, chain saws, model air planes, gasoline powered gardening equipment like hedge trimmers, leaf blowers and soil cultivators. Often, these motors are not exposed to as wide service temperature ranges as in vehicles, so these oils may be single viscosity oils. In small two-stroke engines, the oil may be pre-mixed with the gasoline or fuel, often in a rich gasoline:oil ratio of 25:1, 40:1 or 50:1, and burned in use along with the gasoline. Larger two-stroke engines used in boats and motorcycles may have a more economical oil injection system rather than oil pre-mixed into the gasoline.
The oil injection system is not used on small engines used in applications like snowblowers and trolling motors as the oil injection system is too expensive for small engines and would take up too much room on the equipment.
Environmental legislation for leisure marine applications, especially in Europe, encouraged the use of ester-based two cycle oil.Źródło: https://en.wikipedia.org/wiki/Motor_oil.