Should the Subaru XV use 92 or 95 octane gasoline?
1 Answers
Subaru XV can use either 92 or 95 octane gasoline. Here is some relevant information about 92 and 95 octane gasoline: 1. The octane rating of gasoline (92 or 95) represents the fuel's anti-knock property. The higher the octane number, the greater the content of isooctane, indicating better anti-knock performance. The main difference between these two types of gasoline lies in the composition of n-heptane and isooctane. 92 octane gasoline contains 92% isooctane and 8% n-heptane, while 95 octane gasoline contains 95% isooctane and 5% n-heptane. 2. What car owners need to do is: carefully read the vehicle's manual, understand the compression ratio of the engine, and follow the fuel standards specified in the manual. 3. The primary criterion for selecting gasoline octane rating is the engine's compression ratio, which is also a core energy-saving indicator of modern cars. Engine operation consists of a continuous cycle of "intake-compression-combustion-exhaust-intake" in the cylinders. The compression ratio is the ratio of the cylinder volume when the piston is at the farthest and nearest points of its stroke. 4. The best way to reduce fuel consumption costs is to increase the engine's compression ratio. Increasing the compression ratio only changes the piston stroke. The more the air-fuel mixture is compressed, the greater the combustion reaction, leading to more complete combustion. The compression ratio is matched with an indicator, which is the anti-knock property of gasoline, also known as the octane rating or gasoline grade.
