Can I switch back to 92 gasoline after using 95 for half a year?
2 Answers
It is possible to switch back to 92 gasoline after using 95 for half a year. The difference between 92 and 95 gasoline: lies in the different proportions of n-heptane and isooctane in each. 92 gasoline contains 92% isooctane and 8% n-heptane, while 95 gasoline contains 95% isooctane and 5% n-heptane. The varying proportions of n-heptane and isooctane directly result in different anti-knock properties between the two types of gasoline. The gasoline octane rating actually represents its anti-knock performance, with higher numbers indicating better anti-knock capability (due to higher isooctane content). This has nothing to do with the quality of the gasoline itself, and a higher octane rating does not mean fewer impurities. Precautions when switching from 95 to 92 gasoline: The octane rating of the gasoline used should comply with the manufacturer's specifications. The octane rating only represents a parameter of the gasoline's anti-knock performance; higher ratings indicate better anti-knock properties and have no relation to purity. The anti-knock performance of gasoline is somewhat related to engine operation. Generally, household car engines have relatively low compression ratios and use 92 gasoline with lower anti-knock properties.
My family's SUV ran on 95-octane gasoline for half a year before switching back to 92-octane recently with no issues at all. As long as your car's manual states that 92-octane is acceptable, you can make the switch directly. When switching, make sure to add the new fuel when the tank is nearly empty to avoid mixing. The main difference between 92 and 95 lies in their anti-knock properties, and 92-octane is sufficient for regular naturally aspirated engines. For commuters like me who mainly drive in the city, switching back can save nearly two thousand yuan in fuel costs over six months. However, turbocharged vehicle owners should be more cautious—it's best to check the manufacturer's recommendations. After switching, just keep an eye out for any engine vibrations. My car showed no abnormalities after two weeks of driving.
