What is the difference between gasoline, diesel, and engine oil?

Diesel engine oil and gasoline engine oil need to be used exclusively for special oil.

This is due to the fact that gasoline engine oil differs from diesel engine oil in many ways: due to the difference between gasoline and diesel, diesel engine oil needs to have a higher TBN to neutralize the acids produced by diesel combustion (mainly the sulfur in diesel produces strong acids after combustion); For diesel engine oil with a higher total base number, the ash content of the engine oil is larger after combustion, which will cause excessive deposits in the combustion chamber of the gasoline engine. In addition, due to the high speed of gasoline engine and engine design factors, the sliding friction of the valve system (valve train) is more intense, so gasoline engine oil needs to have a higher resistance to valve wear than diesel engine oil.

Since diesel combustion produces more soot (commonly known as soot), diesel engine oils, especially high-grade diesel engine oils such as CH 4 and CI 4, require better soot control. Of course, there is also a more important thing: gasoline engine oil needs to pass a large number of bench tests of gasoline engines, while diesel engine oil has not been verified by this series of benches, so its reliability and durability cannot be guaranteed.

Vice versa. Of course, there are also many engine oils in the market that meet the requirements of both diesel and gasoline engines, such as Shell Rimula C is APICD SE compliant, which means that Rimula C can be used as SE grade gasoline engine oil in gasoline engines. Shell Red Heineken, which is mainly used as a gasoline engine oil, is compliant with the APISG CD rating and can also be used in diesel engines that require the use of CD grade lubricants. The grades marked on the front indicate the main uses of the oil.

Although there are such gasoline and diesel general oils, they are usually above the SG level of gasoline engine oil and above the CF level of diesel engine oil, and they are used exclusively for oil as much as possible. Because oils that meet the requirements of high-performance engines don't have the best of both worlds.

Gasoline, diesel is fuel oil; Whereas, engine oil is a lubricating oil, which plays a role in cooling, cleaning, lubrication, etc. in the engine. So far, both gasoline and diesel engines need oil to cool, clean and lubricate. As for whether the engines burn gasoline or diesel, it is mainly determined by how they are ignited.

The gasoline engine uses a high-pressure fire to ignite the combustible mixture in the cylinder through a spark plug jumpover. The diesel engine relies on high temperature and high pressure to spontaneously ignite the combustible mixture in the cylinder. Because the diesel engine works roughly and vigorously, it is generally used in large trucks.

Of course, the car also has a diesel one. Motorcycles should run on gasoline.

Engine oil is engine lubricating oil, known as the "blood" of the car, engine oil is a synthetic oil, the main role is to lubricate machinery, reduce mechanical wear, and increase the service life of the vehicle. Gasoline is a mixture of complex hydrocarbons, and light petroleum products, which are used in the largest quantities, are important fuels for engines. The boiling point range is 30 205 and the air content is 74 123 g m**.

The main role of engine oil is to lubricate, clean, cool, seal, reduce wear and other functions of the engine, in short, engine oil is to protect the engine. Gasoline, on the other hand, is the fuel and produces energy that can propel the car forward or backward.

Engine oil is mostly synthetic, while gasoline is a volatile and flammable hydrocarbon mixture liquid that is fractionated and cracked from petroleum.

1. The engine oil mainly plays the role of lubricating machinery, reducing the wear and tear of machinery and increasing the life of the vehicle.

2. Engine oil is extracted from petroleum, and the performance and function of synthetic and semi-synthetic engine oil are similar, but the amount of related materials added in it is different.

3. Due to the low ignition point, gasoline is far away from the engine and is generally placed at the bottom of the middle side of the car. The oil has a high ignition point, and the fuel tank is generally placed near the front of the engine.

Due to the difference between gasoline and diesel, diesel engine oil needs to have a higher TBN to neutralize the acids produced by diesel combustion (mainly the sulfur in diesel fuel will produce strong acids after combustion); For diesel engine oil with a higher total base number, the ash content of the engine oil is larger after combustion, which will cause excessive deposits in the combustion chamber of the gasoline engine.

Diesel engine oil and gasoline engine oil need to be used exclusively for special oil. This is due to the fact that gasoline engine oil differs from diesel engine oil in many ways: due to the difference between gasoline and diesel, diesel engine oil needs to have a higher TBN to neutralize the acids produced by diesel combustion (mainly the sulfur in diesel produces strong acids after combustion); For diesel engine oil with a higher total base number, the ash content of the engine oil is larger after combustion, which will cause excessive deposits in the combustion chamber of the gasoline engine.

Engine oil, that is, engine lubricating oil, can lubricate and reduce friction, assist cooling and cooling, seal leakage, rust and corrosion, shock absorption and cushioning for the engine. It is known as the "blood" of automobiles. Motor oil is not classified as fuel oil, whereas gasoline and diesel are both fuel oils that are used to drive automobiles.

1. The fuel economy grade is different.

The latest 2007 edition of the ACEA European Lubricant Classification Standard is classified into 3 series. They are: A B series:

Gasoline and light duty diesel engine oils. C series: Suitable for catalyst engine oil E series:

Heavy duty diesel engine oil.

2. The compression ratio of the diesel engine is more than 2 times that of the gasoline engine, and its main parts are subject to high temperature, high pressure and impact much larger than that of the gasoline engine, so the production materials of some parts are different.

3. The sulfur content of diesel fuel is larger than that of gasoline, and this harmful substance will form sulfuric acid or sulfurous acid during the combustion process, which will enter the oil pan together with the high temperature and high pressure exhaust gas, accelerating the oxidation and deterioration of the engine oil, so it is necessary to add more antioxidant additives and make the oil more alkaline in the formula of diesel engine oil.

In fact, strictly speaking, whether it is the oil of the diesel engine or the gasoline engine, the chemical composition and physical properties are almost the same, the difference is only that the speed of the gasoline engine is higher, and it can easily reach the speed of more than 6000rpm, and the engine limit speed of some performance sports cars can even reach 20000 rpm, if it is a turbocharged model, the speed of the turbine rotor reaches more than 100,000 revolutions per minute, in addition to lubrication, the oil is also needed to cool and cool down, so it is required to use fully synthetic engine oil. Higher requirements are placed on the fluidity of the oil.

The diesel engine has a low speed, usually no more than 3500 rpm, and there is no problem with using the oil of the gasoline engine.

Take a look at the level marked to see if it is an S or a C, for example, gasoline engine oil is SJ10W30

Diesel is CF10W30. There are also generic ones, such as SJ CC10W30

Diesel engine oils of the same viscosity class are more viscous than gasoline engine oils.

Catalytic exhaust air purifiers are different for diesel and gasoline engines. More anti-wear agents are added to diesel engine oil, generally ZDDP, so the emissions of diesel engines have higher requirements for purifiers, and the purifiers of diesel engines have been specially treated to deal with this problem. If diesel engine oil is used on a gasoline engine, it will cause problems to the exhaust purifier of the gasoline engine.

If only API S* (* stands for an English letter) is marked on the package, it is gasoline engine oil for gasoline vehicles. If only API C* is marked on the package (* stands for an English letter), it is diesel engine oil for diesel vehicles.

The differences between diesel engine oil and gasoline engine oil are as follows: 1. Different fuel economy grades: ACEA European lubricant classification standard, the latest 2007 version of the classification is divided into 3 series.

They are: Xianzhi AU002FB series: gasoline and light duty diesel engine oil.

Class C: Adaptable catalyst engine oil E series: heavy-duty diesel engine oil.

2. The compression ratio of the diesel engine is more than 2 times that of the gasoline engine, and its main parts are subject to high temperature, high pressure and impact much greater than that of the gasoline engine, so the production materials of some parts are different. 3. The sulfur content of diesel fuel is larger than that of gasoline, and this harmful substance will form sulfuric acid or sulfurous acid during the combustion process, which will enter the oil pan together with the high temperature and high pressure exhaust gas, accelerating the oxidation and deterioration of the engine oil, so it is necessary to add more antioxidant additives and make the oil more alkaline in the formula of diesel engine oil. Additional Information:

1. There are two main bases for the selection of diesel engine lubricating oil quality grade. First, according to the sum of the mechanical load and thermal load of the automobile engine, it is expressed by the strengthening coefficient; Then it depends on the harshness of the engine operating conditions. 2. According to the harshness of the engine working conditions and the additional devices in the intake and exhaust system of imported automobiles and the production age, the gasoline engine oil with the corresponding performance level (quality grade) is selected.

Generally speaking, the high quality grade can replace the low quality grade oil, but the low quality grade oil should never be used to replace the high quality grade oil, otherwise it will destroy the suppression and lead to engine failure or even damage.

The difference between gasoline engine oil and diesel engine oil is mainly in the following aspects:

Base oils are different. Gasoline engine oil is based on a different base oil than diesel engine oil, which mainly uses refined mineral oil or synthetic oil, while diesel engine oil mainly uses heavier base oil or synthetic base oil.

additives are different. The different types and proportions of additives in gasoline and diesel engine oil are mainly due to the different mechanical stresses, thermal loads and gas compositions that gasoline and diesel engine oils are subjected to during use.

Viscosity. Diesel engine oil needs to maintain a higher viscosity at high temperatures and pressures to keep the engine running. Gasoline oil, on the other hand, needs to flow better at low temperatures to lubricate the engine faster at start-up.

The difference in cleanliness. Diesel engine oil needs better cleanliness than gasoline oil to remove carbon deposits created after diesel combustion.

Gasoline oil and diesel engine oil have different chemical compositions, additives and performance characteristics, so they cannot be used interchangeably. If the wrong oil is used, it can lead to degraded engine performance, damage to components, increased wear and tear, and even engine failure.

First of all, the two engines have different requirements for oil performance.

Although gasoline engines and diesel engines also work under high temperature, high pressure, high speed and high load conditions, there are still big differences between the two. The gasoline engine is much smaller than the diesel engine, and a large amount of sludge will be generated during the combustion process, which puts forward higher requirements for the dispersion performance of the engine oil to avoid blocking the filter. The diesel engine is much larger than the gasoline engine, and a large amount of carbon deposits will be formed during the combustion process, which has higher requirements for the cleaning performance of the engine oil, so as to quickly clean the carbon deposits and ensure the normal operation of the diesel engine.

In addition, the compression ratio of the diesel engine is more than 2 times that of the gasoline engine, and its main parts are subject to high temperature, high pressure and impact much larger than that of the gasoline engine, so the requirements for the anti-corrosion, anti-oxidation and high-temperature shear of the engine oil are higher. And because the engine oil does not have such a high anti-corrosion requirement, if it is added to the diesel engine, the bearing is prone to spots, pits, and even the adverse consequences of peeling off in pieces, and the oil will quickly become dirty, and lead to the accident of burning the tile and holding the shaft.

In addition, the viscosity and additive formulations of the two oils are different.

Because of the different performance requirements, the viscosity and additive formulations of gasoline and diesel engine oils also differ. Generally speaking, the load of the gasoline engine is small, the clearance of each part is more precise, and the viscosity requirements for the engine oil are not as high as those of the diesel engine, so the viscosity of diesel engine oil with the same viscosity level is higher than that of gasoline engine oil.

At the same time, the formula requirements for additives are also different between gasoline engine oil and diesel engine oil, and diesel engine oil has high requirements for cleaning performance, so it is necessary to add more cleaning and dispersing agents to clean the engine interior more efficiently.