Is it okay to mix half 92 and half 95?

[StCaroline]

If the vehicle's manufacturer recommends using 92-octane or higher gasoline, then it is permissible to use a mixture of 92-octane and 95-octane gasoline, and they can be freely mixed, provided that you go to a reputable gas station. Here is some information about gasoline: 1. Gasoline: It is a volatile, flammable hydrocarbon mixture liquid obtained from the fractional distillation and cracking of petroleum, used as fuel. It appears as a transparent liquid, is flammable, with a distillation range of 30°C to 220°C, and mainly consists of C5 to C12 aliphatic hydrocarbons and cycloalkanes, along with a certain amount of aromatic hydrocarbons. 2. Gasoline has a high octane rating (anti-knock combustion performance): It is classified into different grades based on octane ratings, such as 89, 90, 92, 93, 95, 97, and 98. Starting from January 2012, the gasoline grades 90, 93, and 97 were revised to 89, 92, and 95.

[DeAdriana]

I used to drive for over a decade, and when I was younger, I often mixed 92 and 95 octane gasoline to save money. Once after mixing, the engine made a knocking sound while climbing a hill. The mechanic said it was a detonation issue, and long-term mixing could damage engine components. Car manuals specify the required octane rating, which is tested by manufacturers. Mixing fuels averages the octane value, potentially failing to meet the engine's compression requirements. This is especially risky for older cars or high-performance models, as detonation can easily lead to spark plug damage or piston issues. Now I strictly use the octane rating recommended in the manual. Although it's more expensive, it saves on repair costs in the long run. Mixed fuels may also increase fuel consumption, making it not worth the trouble. Before long trips, I always check gas station options to ensure the car runs smoothly.

[StJuliet]

Honestly, I've also mixed 92 and 95 octane fuel trying to save money. My compact car has been running fine for over a year with occasional mixing – modern engines are quite adaptable. But caution is needed. Octane ratings represent anti-knock capability – mixing averages about 93.5 octane. If your engine requires 95, this could cause minor knocking. Short-term it's manageable, but long-term increases wear (like shortened spark plug life). My advice: occasional mixing when budget's tight is okay, but don't make it routine. Check your owner's manual – it's the bible for this. Don't gamble major repairs for minor savings.

[LaHaley]

Octane rating is an indicator of gasoline's anti-knock performance. The 92-octane gasoline has a lower rating than 95-octane, and mixing them will result in a lower average octane number, potentially below the engine's requirements. If the anti-knock property is insufficient during engine compression, knocking may occur, damaging internal components. Most vehicles are designed with optimized fuel specifications, making mixed fueling risky. It's best to use a single octane rating as recommended in the manual.