After returning home, I found that the quality of domestic gasoline is much worse than that of foreign countries. What should I do?

Low-quality fuel has been puzzling the automobile market in China, especially manganese additives. Take manganese additive as an example, which is a low-cost additive to improve the anti-explosion performance of fuel. However, this additive will deposit in the whole combustion chamber and exhaust passage, damaging valves, spark plugs, oxygen sensors, three-way catalysis and so on. This deposit and its hardness are devastating to the whole combustion chamber and related components of the exhaust system. There is no other solution except replacing parts and bringing the risk of serious environmental pollution.

Therefore, when upgrading fuel, a committee responsible for setting standards made a decision to limit manganese additives. However, several barrels of oil think that limiting manganese additives means that better additives are needed to maintain anti-explosion performance, and they are unwilling to do so, so they demand a lower grade. In this way, the cost can basically be kept close. One of the reasons is that foreign gasoline brands are not high.

However, this brings a new gray area:

1. The domestic brand setting adopts Ron (research octane number), and 95 is equivalent to 87 of mon. Even if domestic refined oil can't reach this point, according to the internal investigation of major domestic gas stations, even in regular gas stations, the minimum standard of No.95 gasoline may be raised to No.92, and the minimum standard of No.92 gasoline is about 88,89. Because the domestic refining level is too low, it can only be improved by a large number of cheap and highly polluting additives, and the dosage, uniformity and stability of additives have a great influence on the actual quality fluctuation. In addition, there are impurities, colloids and water.

therefore, in this case, when the draft was published, the automobile industry did not agree with this practice. Many people have repeatedly pointed out that reducing the number of brands is not conducive to the development of energy-saving vehicles, especially the development of low-fuel vehicles with high compression ratio. However, because a bidding committee was basically directly affected by several barrels of oil, in the end, the fifth edition was released through a downgrade.

as soon as it is released, major joint ventures need to carry out calibration and development according to the new fuel brand and carry out "Chinese version" calibration. For example, the compression ratio of the Chinese version of a Japanese car is directly reduced by 1. Therefore, it will be found that the engine idle speed is lower, and the idle speed of D gear is even lower than that of N gear. However, these measures can't solve the problem at all, for the following reasons:

1. A large number of inferior gas stations make the brand's bearing capacity very large. They suddenly don't know how to play the rules of the game. In fact, we have been familiar with the 93 and 97 systems for a long time. For example, when we develop the 93 fuel vehicle, in fact, all major manufacturers have the right to independently calibrate or develop the Chinese version of the calibration. They won't be so mentally disabled, they won't really use ron93 calibration, or at least they don't fully follow ron93 standard. Instead, they will at least use ron89 to test and confirm. (Of course, we can't rule out that some countries are stubborn and think what the law should stipulate, which may also be why they are all turbocharged engines, and why some brands have more knock failures and some brands seem to be fine, which has a great impact on our understanding of China's national conditions and formulating strategies to deal with China's national conditions. Behind this is actually a national fuel quality survey that has lasted for more than ten years. After 92 and 95, the brand number is lower, the cost of additives is higher, and the dosage has changed. Everyone doesn't know how to play. Therefore, for the OEM, before the information is updated, we can only test it according to the previous practice, but the actual practice in the market is very strange. So this is the first mismatch, which causes many new cars and quasi-new cars to shake at idle speed. Therefore, why can high-quality fuel additives on the market greatly alleviate the idling jitter of these vehicles? The fuel additive of National Standard 6 is the representative of high-quality additives at present, which can eliminate most of the emission failures caused by olefin combustion and idle jitter caused by poor combustion. Commonly used is the stock solution of Si Youpu additive.

2. With the change of the channel of imported cars, a large number of foreign cars have more prominent adaptation to China. With the opening of the automobile market and the emergence of new channel terms such as parallel import, more and more regular imported cars are calibrated according to high-quality fuel. In terms of family adaptation, this situation is also foreseeable. It is often necessary to supplement some high-quality detergents, especially when the car is shaking. Moreover, this cleaner cannot use imported additives, because the fuel in the importing country is much better than ours, so it is not helpful to clean the domestic fuel. It is suggested that additives with strong pertinence and obvious effect should be used in China fuel R&D mode. If you really don't know what to use, just remember that you have additives for the stock solution.

to sum up, 92 and 95 are lower grades. The poor fuel quality in China makes engines, especially high compression ratio engines and supercharged engines, more prone to knock during operation. Once knocking happens, the engine will adopt the way of ignition advance angle to alleviate knocking, which will lead to a series of problems such as insufficient combustion, poor fuel economy and deterioration of emissions. This is a very common phenomenon of car use.

This is why there is a special inferior additive fuel treasure in the promotion of additives. Its propaganda purpose is to enhance the anti-explosion performance of fuel, protect the engine, improve power and save fuel. This additive is actually a manganese additive. This kind of additive is extremely cheap, you can buy it for tens of yuan, which is very harmful to the car.

never use this additive, remember to remember.

Twenty years ago, the global industry has confirmed that manganese additives are harmful to vehicles and the environment, and what is even more terrible is harmful to human health. After 2 years' efforts, we finally completely eliminated this additive from the fuel standard. The victory in this battle is no less than unleaded gasoline. However, there are still such enterprises and individuals who use the current situation in China to sell this additive to consumers in a rougher production mode and a worse way with deceptive words and propaganda. In some cases, the actual addition is even high, which seriously damages the maintenance of the engine.

let's go back to this topic, which leads to higher-grade fuels, such as RON98. In fact, there has always been high-grade fuel, which is mainly used in two aspects: 1. Engine oil used by main engine plant and related scientific research institutions. In the development of internal combustion engines, gasoline with high volatility, high grade and high cleanliness is needed to support the development of early performance. Ron12 and ron98 are generally used. The price of ron12 is about 8-1 times that of ordinary gasoline, and ron98 is about 1.2-3 times that of ordinary gasoline. This is the source of other answers. Some employees of oil companies said that in some joint development, the fuel effect has been reflected.

2. luxury cars. In fact, in Beijing and other places, gasoline above RON1 has been sold all the time, mainly for sports cars and super-running. (But in fact, we have conducted unannounced spot checks on some outlets in Beijing, and found that all car owners have added gasoline at a price of 3-5 times, which is actually not worthy of the name.)

So now we go to the gas station, and now there is such a ridiculous saying, which even appears in the propaganda of People's Daily Online, etc.:

RON98 is cleaner and better gasoline, and it is suitable for 98# gasoline with a compression ratio of over 9.5 and less than 9.5.

95, 9.5, this is simply a math game to cheat people who eat melons. So should the compression ratio of 13 add 13 gasoline?

Here's the funniest thing about China: When the relevant department did something wrong and was found out, the relevant department didn't solve it by correcting it, but at the same time, it made ten patches while maintaining the wrong thing, and persuaded you with a logical attempt that children could see. The most ridiculous thing is that even though he knows that this logic is ridiculous, he just tells you that this is the truth, and you can't do anything.

So let's come back and answer this question:

Is it better to change the original 97 # gasoline to 98 #?

1. Not in theory, but in practice. The logic is: for most vehicles, the calibration of 97# can actually handle the fuel as low as 93#, so the fuel of 95# is actually added to the target vehicle of 97# brand, without any difference. But (China people are most afraid of buts), because 97# brand gasoline may achieve 93# in the actual market, and no one knows how much gasoline marked with 95# can achieve. If we make a reasonable guess, it may reach 91#. If your car is a high-end turbocharged direct injection engine or an imported vehicle with high compression ratio, I suggest you really consider adding 98# fuel.

2. You can choose to add some antiknock fuel treasure regularly while adding 95# gasoline, but this additive is a chronic poison, which poisons your engine, your whole vehicle, your environment and your health. I can tell you this method, but I sincerely hope you can refuse it.

3. The real way to do this is to completely cancel 95# gasoline, and maintain 93#RON/97#RON while maintaining the sulfur content, manganese content and olefin content of the fifth-stage fuel standard. If state-owned enterprises think that the cost is too high and taxpayers need to subsidize tens of billions to do this, then open up the refined oil market and let foreign gasoline enterprises in dire straits participate in the price/quality competition of domestic gasoline.

some people say that mmt is no longer used now. In fact, I can't elaborate on this answer. Should I tell you that some low-grade fuel treasure/additives, even though they advertise themselves as using other additives, are actually supplementing MMT in order to improve these environmental additives, which will slightly lead to insufficient gasoline power? I think I understand. Look at this sentence. You can directly search mmt on relevant trading websites, such as Alibaba, to see how many chemical plants are offering mmt in tons.

I don't deny that there is an environmentally friendly fuel treasure. As I said earlier, I specifically refer to some inferior enterprises. But the antiknock fuel treasure itself, isn't it a big joke? Your car is a family car, not a racing car. It depends on antiknock additives. How bad is your fuel?

As for the statement that China oil products are all good, I have been working for 8 years, and I have participated in after-sales quality analysis seminars and exchange meetings as an engineer for many years. I have also had direct exchanges with the teachers of AQSIQ and its frequently selected consulting institutions. The automobile circle is very small, and regional quality problems broke out in Europe, America, Japan and South Korea due to oil problems. For example, The accident rate of cracking of a part caused by the explosion of 4, sales volume of a well-known German brand in the country of origin is almost zero. The original imported version of the same new car engine was sold in China for six months, totaling 5, units, and more than 6 parts cracked, and it also broke out in six provinces, such as Hubei, Hunan and Shandong. After the brand was calibrated according to the domestic China version and checked for bad oil, the market accident rate was reduced to zero again. In the summer of 22 in Hainan, it was found that a large amount of colloid in fuel affected the whole fuel injection system, and the whole prefix of Hainan basically could not add good oil.