What is the difference between 98 and 95 octane gasoline?
1 Answers
Here are the specific differences between 95 octane and 98 octane gasoline: 1. Compression ratio: Vehicles with a compression ratio between 8.5-9.5 should generally use 95 octane gasoline; cars with a compression ratio greater than 9.5 should use 98 octane gasoline. 2. Octane rating: 95 octane gasoline has a lower octane rating than 98 octane gasoline. That is, 95 octane gasoline contains 95% isooctane, while 98 octane gasoline has an octane rating of 98%. The gasoline grade represents the octane rating of the gasoline. For example, 95 octane gasoline consists of approximately 95% isooctane and 5% n-heptane. Since isooctane has better anti-knock properties and n-heptane has poorer anti-knock properties, a higher grade indicates a higher octane rating, meaning the gasoline has better anti-knock performance.