No. 98 gasoline is known as the "oil noble", why do you say so? Because compared to 92 and 95 gasoline, the advantages of 98 gasoline are mainly reflected in the following aspects:
1, as we all know, the gasoline number represents the octane number of the oil, the higher the number the higher the octane number, said the gasoline is better anti-explosive. 98 gasoline is obviously stronger anti-explosive, so that the engine runs smoother, reduce wear and tear, better protection for the engine.
2, strong anti-explosive, the engine starts more easily, the vehicle idles smoothly, accelerated speed, vibration reduction, the engine can provide more powerful power.
3, 98 gasoline combustion value is higher, can make the fuel burn fully, provide higher combustion efficiency. Improve fuel atomization ability, so that fuel consumption is reduced.
4, 98 gasoline sulfur content is lower, it is not easy to generate oil scale, colloidal substances and carbon deposits, etc., the exhaust pollution is smaller, more environmentally friendly.
The higher the grade, the better
The higher the number of gasoline anti-detonation performance is better, but what does anti-detonation represent?
When the oil and gas mixture into the cylinder, the piston moves upward to compress the oil and gas mixture, when the pressure rises when the temperature rises, if the gasoline resistance is too low at this time, in the spark plug ignition before the start of combustion, resulting in the formation of deflagration, which is commonly known as detonation.
The detonation not only affects the engine output, but also causes damage to the engine.
In fact, every car manual has a term called "compression ratio". Generally speaking, high compression ratio of the engine if the use of low-grade gasoline, will make the gasoline combustion is incomplete, the machine strong vibration, so that the output power drop, damage to parts, fuel consumption and driving weakness.
But if the engine with low compression ratio with high grade oil, there will be a "stagnant combustion" phenomenon, that is, the highest compression ratio is less than the auto-ignition point, the same will be the phenomenon of incomplete combustion, and therefore the need to re-spray to ensure the power output, not only for the engine is not good, and fuel consumption will be the same increase.
In general, the main basis for selecting the gasoline grade is the engine compression ratio.
Usually, the compression ratio of 8.0 ~ 8.5 should be used 90 ~ 93 automotive gasoline; compression ratio of 8.5 ~ 9.5 should be used 93 ~ 95 automotive gasoline; compression ratio of 9.5 ~ 10 should be used 95 ~ 97 automotive gasoline.
You can choose the gasoline grade according to your car model
No. 92 gasoline is suitable for ordinary cars with low technical content.
For the models below 100,000 yuan on the market, No. 92 gasoline is their best partner, which is suitable for those models with mature engine technology and no excessive requirements for fuel. 95 gasoline is suitable for most cars 95 gasoline is generally suitable for turbocharged and higher compression models, it is compatible with most of the models on the market today, whether it is a few tens of thousands of dollars of small cars, or hundreds of thousands of dollars of premium cars.
98 gasoline is suitable for high-grade luxury cars and high-horsepower sports cars.
Compared with the 92 and 95 gasoline, the production of 98 gasoline for technology and equipment requirements are higher, China is also in the last two years to achieve the standard gasoline domestic.
The anti-detonation performance of 98 gasoline is undoubtedly the best of the three gasoline, but also the highest production standards. For European luxury cars with more sophisticated engines and complex electronic systems, it is still recommended to use 98 gasoline when conditions permit.
Of course, this advice is for reference only, and the choice of gasoline grade should not be divided by the selling price of the model.
If you are not sure, go to find the car's vehicle manual or tank cap on the tip, you know the car is suitable for adding 98 gasoline!
Here again, I solemnly remind: whether to choose a higher grade of gasoline is determined by the engine compression ratio.
High compression ratio to choose a high grade of gasoline on the car has many benefits, but if it is a low compression ratio of the car blindly choose a high grade of gasoline, then there will be a "stagnant combustion" phenomenon, resulting in incomplete combustion, in the driving will produce acceleration of the phenomenon of powerlessness, not only resulting in unnecessary waste, the engine is also not much good.
It should be noted that, in the use of car owners do not frequently change the gasoline standard, choose a good oil, it is best to "from one to the end", long-term plus the same kind of oil.