Where there are people, there are rivers and lakes
Where there are cars, there is oil.
Engine oil is a good friend of the engine. As such an important coffee place, the "legends" about engine oil naturally emerge one after another, and even there are different opinions. So, how to distinguish the true and false of engine oil in rivers and lakes?
Listen to us unveil the real veil of engine oil for you ~
0 1. A talented Tang Fang engine man can cover up his reputation with a skill.
Although engine oil serves the engine, its scientific name is also called "lubricating oil", but it is hidden and noble. It silently adheres to five core functions but never says much:
02. The oil family has a huge branch, and each has its own needs according to the situation.
There are many kinds of engine oil, but its development is still a process of advancing with the times, but it also retains some consumers' independent and diversified choice space according to their own car conditions.
1, mineral oil
Petroleum extracts with strong antioxidant capacity and stable performance but poor cleanliness have gradually withdrawn from the main stage of the market.
2. Semi-synthetic engine oil
It is an upgraded version of mineral oil. Different manufacturers have different formulas and different performance emphases. Usually suitable for engines with small displacement and low working conditions.
3. All synthetic engine oil.
Can be understood as an upgraded version of semi-synthesis. The temperature range is wider, and the engine can be protected with lower viscosity. Although it has the highest price, it is increasingly favored by car owners. Synthetic engine oil has strong adaptability and excellent effect, and has stepped onto the peak of today's "oil" production, which is well deserved.
03. Is the label as complicated as lipstick? How to identify the key at a glance
Lipstick for girls is famous for its numerous color numbers and complicated names. I'm afraid the oil label is one of them. Girls have a gift for recognizing lipstick numbers. If you still can't recognize the engine oil number ... remember it quickly.
"W" is the abbreviation of English Winter: the smaller the number before W, the better the low-temperature fluidity. The better the fluidity at low temperature, the lower the cold start temperature of oil.
The following figure shows the high temperature/kinematic viscosity index: the higher the value, the thicker the oil is when working, and the higher the viscosity means good anti-wear protection and good sealing performance.
In the API quality grade, the oil starting with "S" is special for gasoline engines, and the oil quality grade starts with SA, and the higher the quality.
Tip: Different driving conditions will also affect the choice of oil viscosity:
1. When the vehicle speed is relatively stable, the oil with relatively low viscosity can reduce fuel consumption;
2. Under the road conditions where rapid acceleration and deceleration are often needed, you can choose engine oil with relatively high viscosity, which can protect the engine.
04. The oil market is mixed. It is better not to change than to choose the wrong one.
Changing the oil according to the advice of the maintenance manual is of course the key to ensure the health of the oil, but if you choose the inferior oil by mistake, it will really hurt people more than forgetting to change it after expiration.
1, the cleaning performance of inferior engine oil is poor, and the metal powder, sludge, oil carbon and other substances deposited in engine oil are constantly accumulating, which accelerates the abnormal wear of engine cylinder and piston.
2. Poor fluidity causes the engine to suck air from the oil filter screen, resulting in abnormal wear and abnormal noise of the bearing plate.
3. Long-term use of inferior engine oil will seriously damage the engine and bring huge losses.
05. Bearing in mind petroleum science, is there any shortcut to save effort and worry?
There are many kinds of engine oils with complicated labels and uneven quality. ........
But through the above popular science, I believe you already have the evaluation standard of good engine oil in your heart, but driving is enjoyment, and rest assured and effort is the true meaning ~
Good engine oil can:
√ Good compatibility of tail gas aftertreatment device, extending the service life of aftertreatment device.
√ Fully synthetic base oil with good low-temperature fluidity and high-temperature oxidation resistance.
√ Low volatility, low oil consumption, high performance functional additive, keep the engine clean, provide good anti-wear protection, reduce carbon emissions to protect the engine and prolong its service life.
06. Does the oil filter lock CP? Is it necessary to gain IQ?
Although "the oil filter can't leave home" is familiar, many friends still hold their own opinions. It doesn't matter, after knowing the truth, you will naturally have a judgment.
The full name of mechanical filter is oil filter, which is the "purifier" of engine oil, and is used to filter out the carbon deposition caused by high temperature oxidation during engine operation.
Clogged engine oil filters and filter elements can cause:
1, unable to filter oil better.
2. It will cause the increase of carbon deposition, high fuel consumption and weak acceleration. If the engine cylinder piston is seriously worn, it will directly affect the engine life.
Tips:
Competition between superior and inferior machine filtration
The left side is of good quality, and the right side is of inferior filter element. You can't tell whether the packaging is good or bad. It can be cut at a glance, and the oil filter is not separated. Only when you change can you feel at ease.
Using fake and inferior oil filters will lead to dry friction or excessive wear of parts due to poor uniformity of filter paper and low filtration efficiency, and the debris generated during operation will not be effectively filtered, which will accelerate the internal wear of the engine.
07. The more refueling, the better?
No ~ no ~ no ~ no ~ no ~ stop quickly, pay attention to everything, there are too many, and so is refueling.
More oil:
1. The running resistance of the engine increases, resulting in a decrease in power and an increase in fuel consumption.
2. Excess engine oil will flow into the combustion chamber of the engine to accelerate the formation of carbon deposits.