Now if someone says they can't afford a car, everyone will be impatient. Therefore, economic standard of living of many people has improved significantly, but cars, as a consumable item, are attracting more and more attention from consumers. What editor wants to discuss with you is related to car maintenance, which is also a topic that many car owners are very concerned about. Especially phenomenon of engine oil burning in Honda cars before, it becomes even more discolored when people mention "oil". But engine oil must be used in every car, so what advice do you have on how to change engine oil? Let's see what car repairman told us.
We all know that when we pick up car, 4S store staff will change oil after we drive 5000km. That is, many novice car owners consider 5000 km to be most suitable mileage. So some people drive day and night just to do 5000km and then change oil. I think that after that break-in period will be passed, and it will be possible to hit road with confidence in process of use in future.
Actually, this master repairman, who has been repairing cars for 30 years, said: Engine oil quality is now generally good, and there is no need to change engine oil every 5000 km, everyone should know reason. However, an oil change is mandatory; under normal conditions, it is enough to change it every ten months. Changing it every six months is fine, but I think it's a waste of money and it will only empty your wallet.
Actually motor oil is best after half a year, but if you are asked to change your motor oil at this time, it will actually have a big impact on your car and break-in process. Basically, changing engine oil once every 5,000 miles is a very good period of time for a car, and changing an oil filter element together can kill two birds with one stone.
Oil change method
The usual oil change method is to change oil according to specified mileage/time by unscrewing oil pan screw to drain oil or by bleeding oil, but change is not complete. Engine oil that has not been changed is often worst used oil. When new lube oil is added to engine, old oil immediately mixes with new oil, which reduces various properties of new oil, resulting in an earlier lube oil life.
However, even experienced drivers often make these six mistakes when using engine oil!
1. I'll change oil when it turns black
Many times we noticed that oil in engine turned black. Does this mean oil has deteriorated?
Although engine oil easily oxidizes and deteriorates when operating at high temperatures, with continuous improvement of lubricating oil quality, especially when using multigrade oil, blackening of engine oil does not necessarily mean deterioration.
There are two reasons for engine oil to turn black: after filling in new engine oil, oil sludge and deposits on previous parts will dissolve in engine oil, and engine oil will turn black after a short time. .
2. The higher viscosity, better
Viscosity is a very important parameter of engine oil.
The viscosity ensures that during operation of engine or other parts to be lubricated, an oil film can form on movable contact surface, which reduces wear on contact surface and prolongs service life.
However, higher viscosity of oil, better. During operation of machine, lubricating oil must flow quickly and be applied to relevant parts so that an oil film is formed for lubrication.
Oil with too high viscosity has poor fluidity, so it cannot reach lubricated parts in time and efficiently for lubrication, which accelerates wear of moving parts.
3. Engine oil is only added, but not changed
The performance of engine oil will gradually decrease due to pollution and oxidation during use, and at same time, some consumption will be observed. Some car owners will choose to add but not change, thinking it will save money.
However, only replenishment without replacement can only make up for lack of engine oil, but cannot compensate for loss of engine oil lubricity.
4. Engine oil more than less
The amount of engine oil must be controlled between upper and lower marks on dipstick.
Excess engine oil will flow from gap between cylinder and piston into combustion chamber, forming carbon deposits. These carbon deposits increase compression ratio of engine and increase chance of detonation.
Second, too much engine oil increases mixing resistance of crankshaft connecting rod, which increases fuel consumption.
In addition, adding too much engine oil will increase internal pressure of engine, which will easily cause oil to leak from engine seals.
5. It is good to add additives to engine oil
A truly high-quality engine oil is a finished product with multiple engine protection features. Various additives, including anti-wear additives, are already present in formula, and in engine oil, greatest attention is paid to balance of formula to ensure a complete game of various performances.
Adding other additives on its own not only cannot provide additional protection to vehicle, but also easily reacts with chemicals in engine oil, resulting in a reduction in overall performance of engine oil.
6. How to determine that engine oil needs to be changed?
Finally, I will teach you how to determine for yourself if oil needs to be changed. Remove dipstick, put a few drops of oil on filter paper and observe condition of filter paper after 24 hours.
As a rule, depending on color depth of engine oil, a "three ring phenomenon" occurs on filter paper. The inner ring is called sedimentation ring. The deeper sediment ring, higher store; middle ring is diffusion ring. The wider diffusion ring, longer residual oil life; The outermost ring is oil ring, and boundaries of oil ring, diffusion ring, and deposition ring should be as blurred as possible.