90 91 Gasoline, what does it mean, and how is gasoline classified?

The classification of gasoline is classified according to the octane number it contains, such as 90, 97, etc., the higher the octane number, the smaller the chance of deflagration produced by the car, and the better it is for the engine. Therefore, most high-end cars use gasoline with a higher grade.

Diesel is classified according to its freezing point, with 0 representing that when the temperature drops below 0 degrees Celsius, it will condense into solids. In the same way, 10 represents 10 degrees Celsius before condensing into solids, which is why diesel cars in the north use lower grades in winter to prevent fuel from being frozen.

No. 92 gasolineThat's itOctane numberNo less than 92 gasoline. No. 95 gasolineIt refers to gasoline with an octane rating of 95 or higher. Next, we will take a closer look at the two types of gasoline.

1.What is Octane?

Before we understand the two types of gasoline, we must understand what the octane number is, because the octane number is an important indicator to distinguish gasoline. The official term for octane number is: refers to the index of the fuel used in the car to resist the explosion.

In other words, it is the fuel that suppresses the ability of the detonation. The higher this value, the stronger the ability of the fuel to suppress the shock and explosion, and the less likely it is to damage the engine.

No. Gasoline

No. 92 gasoline is gasoline with an octane rating of 92 or higher. This is the most lazy gasoline of all. Many entry-level cars and cost-effective cars are using this kind of gasoline, this gasoline is not good knock resistance, long-term use will damage the engine, but it doesn't matter, during the life of the engine, in addition to the car performance will be reduced year by year, it will not have any impact on your car.

So don't worry about that. But No. 92 gasoline has a fatal drawback, that is, it is polluting to the environment.

No. Gasoline

No. 95 gasoline is gasoline with an octane rating of 95 or higher. Don't look at the number is only 3 larger, but it is ahead of 92 gasoline in all aspects. But now it is the mainstream gasoline in China, and because of environmental protection policies, China's emission requirements for vehicles are even higher.

Because 95 gasoline causes much less pollution to the environment than 92 gasoline, more and more cars now use 95 gasoline, so that it can perfectly meet China's national standard, otherwise the car will not be listed. Moreover, after using 95 gasoline, there will be no shortcomings like 92 gasoline, no matter how long 95 gasoline is used, its impact on the performance of the car is negligible.

In general, 92 gasoline refers to gasoline with an octane rating of 92 or higher. No. 95 gasoline refers to gasoline with an octane rating of 95 or higher. This is also the official definition, there is nothing to say.

92 gasoline and 95 gasoline are the labels of gasoline, which is the ratio of the anti-knock resistance of actual gasoline to the anti-knock resistance of standard gasoline. The higher the grade, the stronger the anti-explosion performance. To choose gasoline according to the engine of the car, the higher the grade, the better.

92 gasoline refers to gasoline with an octane ester content of 92, while 95 gasoline refers to gasoline with a content of 95, and 95 gasoline has a greater calorific value than 92.

92 gasoline refers to gasoline with an octane number of 92, and 95 refers to gasoline with an octane content of 95.

No. 92 oil is generally suitable for low-end cars and other general gasoline vehicles.

No. 95 gasoline

Generally, it is suitable for medium and high-end cars and other vehicles with high fuel requirements.

No. 98 oil. It is suitable for more high-end cars and special vehicles.

In total, it is the identification of three different grades of gasoline.

1. Different grades of gasoline serve engines with different requirements.

2. The engine is designed with different explosion resistance according to the vehicle to meet the requirements of driving.

3. In order to meet the requirements of the engine, gasoline passes the octane number.

The difference was formed, forming gasoline No. 92 95 98.

95 98 gasoline is to serve the requirements of different types of engines.

Gasoline refers to the standard gasoline of this mark, which contains 92% isooctane and 8% n-heptane, which has the same anti-knock resistance; 95 Gasoline refers to the standard gasoline of this mark containing 95% isooctane and 5% n-heptane, which has the same anti-knock properties.

The higher the gasoline grade, the stronger the anti-knock performance. Standard gasoline is composed of isooctane and n-heptane. It is not that the higher the grade, the better, but the gasoline grade should be reasonably selected according to the engine compression ratio, and the gasoline grade determines the detonation point sooner or later, and also determines the power of the engine.

The knock resistance of fuel varies depending on its composition. The higher the knock resistance of the fuel, the higher the compression ratio of the engine, and the economy and power of the engine will be improved.

It is difficult to determine the knock resistance of a fuel because the knock resistance of a fuel depends not only on the nature of the fuel, but also on the type of engine, air-fuel ratio, cooling water temperature, intake temperature, ignition advance angle, valve timing, etc.

For cars, refueling is essential. Now we can often see 92 gasoline and 95 gasoline on the market, and everyone knows that compared to 92 gasoline, 95 gasoline will be slightly higher. As the saying goes, you get what you pay for.

What is the difference between 92 and 95 gasoline? Experts tell the truth and make a mistake in scrapping the engine.

The difference between 90 gasoline and 92 gasoline is that the octane number is different, and the octane number of 92 gasoline is higher, and the stability of this gasoline is also better. There is a difference in octane number between different grades of gasoline.

Some cars have engines that require 92 gasoline, and some cars have engines that require 95 gasoline. If the octane number of the gasoline used is too low, the engine is likely to detonate while working. Detonation is an abnormal combustion phenomenon in the engine.

When the piston is in the compression stroke, the piston is running upwards to compress the combustible mixture, at which point the temperature and pressure of the combustible mixture rise.

If the anti-knock property of gasoline is not good, the combustible mixture will burn in advance before the spark plug is ignited, which is detonation. Knocking is harmful to the engine, and severe knocking can even cause the connecting rod to deform or the piston to burst. Generally, family cars with naturally aspirated engines can use 92 gasoline, and family cars with turbocharged engines are fine.

95 gasoline is fine, and high-performance models need 98 gasoline. (Photo by Li Linwei) @2019

What does the "90" in No. 90 gasoline Li bury mean?

a.Resistance to the explosion of the big indicators.

b.The purity of gasoline.

Correct Answer: a

No. 90 gasoline means that it contains 90% of the "isooctane" with strong detonation resistance and 10% n-heptane with poor detonation resistance. Therefore, the octane number has become an indicator of the ability of the gasoline engine to resist detonation. If you use No. 90 gasoline, it is not easy to knock.

No. 90 gasoline refers to the fact that it contains 90% of the "isooctane" with strong knock resistance, that is, it contains 10% of the n-heptane with poor knock resistance. Therefore, the octane number has become an indicator of the ability of the gasoline engine to resist knocking. If you use 90 gasoline, of course, it is not easy to detonate.

Since November 1, 2009, Shanghai has implemented the National IV standard in advance for all light gasoline vehicles, public transportation, sanitation and postal vehicles in the process of new car registration. At the same time, the "Shanghai" standard refined oil was fully sold, and the use of No. 90 gasoline was stopped.

The difference between 92 and 95 gasoline is the octane number.

No. 92 gasoline is a gasoline with an octane number of 92 and a n-heptane of 8, which is suitable for mid-range cars; No. 95 gasoline is 95% isooctane, 3% n-heptane, suitable for high-end cars. When the engine compression ratio is high, high-octane gasoline should be used, if the compression ratio is high, low-octane gasoline will cause abnormal combustion, resulting in detonation, fuel consumption and driving weakness.

The higher the designation, the higher the octane number, the better the resistance to knock out of the gasoline. The label of gasoline is compared with the standard fuel artificially blended, this standard fuel has two components, one is isooctane with good knock resistance, and the other is n-heptane with poor knock resistance, and gasoline with the same knock resistance as the standard fuel containing 92% isooctane and 8% n-heptane is called 92 gasoline.

1. When refueling, you should turn off the fire, do not call ** to play with your mobile phone, and do not use an open flame in the gas station. Don't pick up calls** inside the gas station and don't play with your phone. When refueling, be sure to turn off the engine.

If there are more people, then you have to queue, and when queuing, be careful not to cut the queue, and be orderly.

2. When choosing oil, when refueling at ordinary times, you must choose a gas station with better oil products, and do not go to some gas stations with poor oil products. If you use very poor quality gasoline for a long time, it will lead to more carbon deposits in the engine. It is not only necessary to choose a gas station with better oil quality, but also to choose the correct gasoline label.

The gasoline label represents the anti-knock resistance, and the larger the mark, the better the anti-riot ability, which has nothing to do with the quality of the gasoline itself, nor does it mean that the higher the mark, the less impurities there will be. What is Knock Resistance? The first thing about this kind of detonation is the inside of the engine, where the mixture is ignited by the spark plug and the energy is released to drive the piston to do work.

Knocking, on the other hand, is simply an abnormal combustion inside the engine.