Is it OK to mix 93 and 87 gas?
By using higher octane fuel where lower is specified, you will create no problems with your engine.
It does not (by popular belief) add any power to your engine, but will not harm it at all.
When you mix different octanes of fuel, you are either increasing or decreasing the octane of the fuel at hand..
Is there a difference between 89 and 93 gas?
Octane is how much compression a fuel can withstand before igniting, or rather it’s a measurement of a fuel’s ability to avoid knock. … Typically “regular” gas is 87 octane, “midgrade” is 89 octane and over 91 octane is “premium” gasoline. Some states label top-tier gasoline with 93 octane as “ultra” gas.
What happens if you mix 87 and 89 gas?
Yes. You will not harm your car by mixing different octane grades of the same gasoline providing your car’s engine is designed to run on less than 89 octane fuel and you are not using E85 in a non-E85 compatible engine. … Most gas stations that sell 87, 89 and 91 octane gas use what is called a mixer pump.
What happens if you put 89 gas in a 93 car?
“Use premium unleaded gasoline with a posted octane rating of 91 or higher. If the octane rating is less than 91, you could damage the engine and may void your vehicle warranty. If heavy knocking is heard when using gasoline rated at 91 octane or higher, the engine needs service.”