Mixing Premium And Regular Gas

The answer to 1 is easy. Can i mix fuels. The premium octane is usually going to sit at around 91 while the regular gasoline is right around 85 to 87.

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We often get these two questions.

Mixing premium and regular gas. Premium gasoline costs a lot more but although it doesnt have ethanol and might have a few added detergents its not better. Mixing the grades to get 91 or so shouldnt hurt but it probably isnt saving you much money. Yes you can mix any of our race fuels. In terms of actual energy produced including improved mpg there is actually no real difference between unleaded and premium.

In fact mixing regular and premium at the pump is how most gas stations get their mid grade. Mixing fuels and calculating octane. You get better mileage with premium not because of the energy density of the fuel but because the higher octane allows the engine to run more advanced timing. What is the octane when i mix them.

Most cars except those whose engines are specially designed for premium gas will do just fine with regular gas. But remember if your engine needs an unleaded fuel you dont want to mix leaded with unleaded. But some engines are geared for mid range. Also some older engines that used to be fine with regular gas will start knocking unless the higher octane mid range is poured in.

Motors designed to run premium also make better power because higher octane also allows for higher compression ratios. If you look at the gas pumps at any gas station the premium fuel has a higher octane level on it. If your car needs premium youll lose a bit of power and efficiency with every bit lower octane your mix ends up being but it can still run without damage even on pure regular.