What is the difference between 98 and 95?
4 Answers
The main difference between 98-octane gasoline and 95-octane gasoline lies in their octane ratings and anti-knock combustion capabilities. Below are explanations about gasoline grades and refueling precautions: Meaning of gasoline grades: Gasoline grades represent the octane rating of the fuel. 98-octane gasoline refers to a mixture equivalent to 98% isooctane and 2% n-heptane, while 95-octane gasoline consists of 95% isooctane and 5% n-heptane. Higher octane numbers indicate better anti-knock performance of the gasoline. Refueling precautions: When using automotive gasoline, improper fuel entering the fuel system may damage both the fuel system and the engine; Do not use gasoline containing methanol or alcohol; Avoid spilling fuel on painted surfaces to prevent damage; If the fuel tank door is frozen and cannot be opened, gently push or tap the door to remove ice and open it.
Both 98 and 95 are common gasoline grades, with the main difference being the octane rating. The higher octane value of 98 means it has better anti-knock performance. When I used to modify engines for fun, I found that 98-octane fuel is particularly effective in high-performance cars or turbocharged engines, providing smoother acceleration and more stable engine operation, especially with fewer knocking issues during high-speed driving or uphill climbs. On the other hand, 95-octane fuel has slightly lower anti-knock performance, but it's perfectly sufficient for regular family cars, with decent engine response. However, 98-octane fuel is a bit more expensive. Occasionally filling up with a tank can help clean internal engine carbon deposits and improve efficiency, but long-term use isn’t cost-effective. I recommend choosing based on your car model—sports cars should prioritize 98, while regular cars can stick with 95 for practicality and affordability. Don’t blindly go for premium fuel; it’s not worth the extra cost.
As a regular office worker, I drive to and from work every day, often filling up with 95 and 98 octane fuel. When driving my sedan in the city, the difference between the two is almost negligible, with smooth acceleration from a standstill. However, on long-distance trips or when overtaking on highways, 98 octane fuel makes the engine quieter, with more responsive throttle, making driving less strenuous; 95 octane is perfectly adequate for everyday driving, with no noticeable issues. Price-wise, 98 octane is more expensive, costing a bit more per liter. I've done the math, and the money saved by using 95 octane is enough for quarterly tire maintenance. Honestly, unless your car's manual recommends higher octane fuel, there's no need to insist on 98. I think 95 is a balanced choice—the difference in daily driving is minimal. The key is to consider your budget and habits, and not let your car become too picky.
From a cost-saving perspective, the main differences between 98 and 95 gasoline lie in price and actual performance. 98-octane fuel has a higher octane rating and better anti-knock properties, but after years of driving economy cars, I've found it costs slightly more per liter than 95 with almost no noticeable improvement in normal driving. Unless your vehicle has a high-compression ratio engine or is performance-oriented, 95-octane is perfectly safe for driving and won't affect engine lifespan. While 98-octane costs more, it doesn't significantly save fuel consumption. I recommend 95-octane as the most cost-effective daily choice - the money saved can be better spent on maintenance for greater value.
