What are the methods for choosing car gasoline?
1 Answers
Car owners should add gasoline according to the engine's compression ratio or follow the recommendations in the car's user manual, which is more scientific and economical, and can fully utilize the engine's power. Here are some introductions about gasoline: 1. Anti-knock performance: The evaluation index of gasoline's anti-knock performance is the octane number, which is the gasoline's grade. It is the ratio of the actual gasoline's anti-knock performance to that of standard gasoline. Standard gasoline is composed of isooctane and n-heptane. Isooctane has good anti-knock performance, and its octane number is defined as 100; n-heptane has poor anti-knock performance and is prone to knocking in gasoline engines, so its octane number is defined as 0. 2. Principle: The main basis for choosing gasoline grades is the engine's compression ratio. Parameters such as compression ratio and ignition advance angle have already been set in the engine's computer. As long as car owners strictly follow the requirements in the user manual to choose gasoline, there will be absolutely no problem.