What grade of fuel should a normal car use?
1 Answers
Usually, the fuel grade label is marked on the fuel tank cap. The only criterion for selecting the gasoline grade is the compression ratio of the car engine. Generally, the higher the compression ratio, the higher the gasoline grade. Typically, when the compression ratio is between 7.5-8.0, 90-93 grade gasoline should be used; for a compression ratio of 8.0-8.5, 90-93 grade gasoline is suitable; when the compression ratio is 8.5-9.0, 93-95 grade gasoline should be selected; and for a compression ratio of 9.5-10.0, 95-97 grade gasoline is recommended. The manual clearly specifies which grade of gasoline to use. There is no mistake in following the manual's instructions. Generally, the higher the compression ratio, the higher the gasoline grade. However, a high compression ratio does not entirely mean that high-grade gasoline is required. With clever engineering, high-compression engines can also use lower-grade gasoline.