Can 98 and 95 be mixed?
2 Answers
It is best not to mix 98 and 95. It is better not to mix different grades of gasoline. If the owner previously added 98 gasoline, the next time they refuel, they should also add 98 gasoline. In special circumstances, adding 95 gasoline once is not a big problem, but doing so for a long time will cause engine knocking, increase engine carbon deposits, and increase fuel consumption. If the owner wants to change the gasoline grade, it is best to use the gasoline in the car's fuel tank until the fuel gauge light comes on before refueling, or directly extract it and then switch to another grade of gasoline, rather than mixing them directly.
Generally, it is not recommended to mix 98 and 95 gasoline. Although an occasional mix might not cause immediate problems, long-term mixing can lead to engine issues. 98-octane gasoline has better anti-knock properties and is suitable for high-performance engines. Mixing with lower-octane gasoline reduces the octane rating, making the engine prone to knocking under high temperature and pressure, which can result in reduced power and increased fuel consumption. If you frequently drive long distances or carry heavy loads, extra caution is needed. Every car's user manual specifies the recommended octane rating, and it's best to follow it. I've seen experienced drivers mix fuels carelessly, only to end up with constant engine vibrations and repair costs running into thousands. So, the safe and cost-effective approach is: either stick to 98 or stick to 95. Don't try to save a little money at the expense of your car's health—proper maintenance is what really counts.
