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Gulf: The brand is American, and it sponsors a lot of racing events, which is not a small brand;
Shell: Big brands, the market is much smaller, but the quality of the products should be the best.
1. During the whole process of the driving test, the oil pressure and water temperature were maintained well, indicating that the oil has good viscosity retention ability and clean dispersion ability;
2. The test vehicle did not add engine oil during the driving process of 21497km and 13423km (mountain road), which verified that the evaporation loss of the oil was low;
Shell does not have its own refinery, and China's refined oil and ** imports are also restricted, Shell more choose to joint ventures with domestic enterprises, both with a few barrels of oil joint ventures and with local refineries (Shaanxi Yanchang Group), his oil intake channels are diversified, if it is the oil of local refineries, the basic quality is generally inferior to PetroChina Sinopec, the addition of fuel additives is to improve performance, but also a marketing highlight, two barrels of oil oil was originally added additives factory, But now it is not added, but the user chooses whether to buy fuel additives or not. To sum up, I personally feel that Shell's service is indeed better than a few barrels of oil overall, but to say that the quality is better than two barrels of oil is arbitrary.
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The Gulf is almost the same as the domestic Longpan, how can it be compared with Shell?
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Gulf oil is of good quality.
Gulf engine oil has a great influence in the world, but its reputation in China is not very good, which may be the result of unfair competition in the industry, in fact, the quality of this brand of engine oil is still okay.
Gulf Engine Oil is a motor oil brand owned by its parent company, Gulf Gulf Oil International Inc. of the United States. The reason why some people say that Gulf engine oil is very bad is mainly because of the brand awareness mentioned earlier.
Gulf Oil entered China in 1995 and has not yet opened up the situation, so it is no wonder that some people will question this brand. But on a global scale, Gulf oil isn't that bad.
The role of motor oil:
1. Lubrication: There is a rapid relative sliding between the piston and the cylinder, between the spindle and the bearing, and to prevent the parts from wearing out too quickly, it is necessary to establish an oil film between the two sliding surfaces. An oil film of sufficient thickness separates the surface of the relatively sliding part to reduce wear.
2. Auxiliary cooling and cooling: the specific calorific value of the engine oil is low, and it does not have a cooling effect inside the engine. However, due to the heat generated by fuel combustion in the engine, when the engine is working, the oil can bring the heat back to the oil tank and then dissipate it into the air to help the water tank cool the engine, and the real cooling effect is the water (or antifreeze liquid) outside the engine case.
3. Cleaning and cleaning: good engine oil can bring carbide, sludge and wear metal particles on the engine parts back to the oil tank through circulation, and wash the dirt generated on the working face of the parts through the flow of lubricating oil.
4. Sealing and leakage-proof: The oil can form a sealing ring between the piston ring and the piston to reduce gas leakage and prevent external pollutants from entering the slow stool.
5. Anti-rust and anti-corrosion: lubricating oil can be absorbed on the surface of parts to prevent water, air, acidic substances and harmful gases from contacting parts.
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Shell is a world-renowned brand with a long history and strong strength, and Gulf is a small brand.
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The Gulf brand is American, and it sponsors a lot of racing events, which is not a small brand. Shell, the big brands know it. It should be changed to say that the market is much smaller than the bay, but the quality of the products should be the best, so you can try it to see which one is more suitable for you, no one is better than whom.
Unless copycats and ** too.
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