Can I switch from 95 to 92 gasoline after using it for three years?
2 Answers
If 92-octane gasoline is permitted for use, either 95 or 92 can be used. However, suddenly changing the gasoline type may still have some impact on the engine, such as increased carbon deposits. Below is relevant information about gasoline octane ratings: Density of different octane gasoline: The density varies among different octane ratings, with the most common being 92-octane and 95-octane gasoline. The density of 92-octane gasoline is approximately 0.72g/ml, while 95-octane is about 0.725g/ml, and 98-octane is around 0.737g/ml. Octane rating: The reason gasoline has octane ratings is primarily due to the different anti-knock properties of various ratings. It's not that higher octane gasoline has fewer impurities; rather, the higher the octane rating, the better the anti-knock performance. Higher octane gasoline is less prone to pre-ignition during engine operation. Additionally, the engine's compression ratio determines the required gasoline octane rating.
After using 95-octane gasoline for three years and switching to 92, I didn't notice any major issues, but it depends on your car's engine requirements. 95-octane has a higher rating and better anti-knock properties, making it suitable for high-compression engines. Switching from a higher to a lower grade after long-term use might result in reduced power or minor noise, but most modern cars can adjust automatically. The key is to check your owner's manual: if it recommends 92 or lower, switching is fine; if it recommends 95, don't take the risk—knocking could damage the engine. I suggest testing a small amount of 92 first, like mixing half a tank to observe performance. Saving on fuel costs is great, but prioritize safe driving. In the long run, the savings can be significant, just don't overlook potential risks.
