Question: What Happens If You Put 93 Octane In A 87 Octane Car?

Can higher octane hurt your engine?

The higher the octane, the greater its ability to prevent the unruly type of combustion engineers call detonation.

The goal is to ignite the fuel mixture solely with the spark plug, rather than from the heat in the cylinder, to prevent detonation, which can seriously damage high-performance engines..

Does high octane fuel clean your engine?

In fact, in most cases, using a higher octane gasoline than your owner’s manual recommends offers absolutely no benefit. It won’t make your car perform better, go faster, get better mileage, or run cleaner. Your best bet: listen to your owner’s manual.

What happens if you put premium gas in a regular gas car?

If your engine runs fine on regular, filling it with premium is unlikely to boost acceleration or fuel economy by more than insignificant amounts. … The higher octane of premium gas won’t make your car faster; in fact, the opposite is possible because higher-octane fuel technically has less energy than lower-octane fuel.

What happens if you put 87 octane in a 91 octane 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. … They usually warn that using lower-octane gas could reduce performance and fuel economy.

Can you run 87 octane on a 93 octane tune?

You can run higher octane fuel, which on a car with a continuous variable valve timing system in place will yield a little benefit, but you should never run a lower octane fuel than what you were tuned for.

Does premium gas give better mileage?

Premium gas gives you more miles per gallon than regular gas. … In actual fact, you’ll get a greater range of fuel economy between different brands of regular gas, than you will between the same manufacturer’s regular and premium gasses.

Does premium gas last longer?

Sadly, there’s nothing in premium gasoline that would make it last longer than other fuels from the pump. Since the distinguishing feature is the higher-octane levels, the only real benefit you gain is lowering the chance of engine knocking, which isn’t much of a threat on most modern fuel systems.

Does 95 octane give better mileage?

Because they have a higher octane rating, the 95 and 98 octane petrols contain slightly more energy and thus will provide a very small increase in fuel economy – but not enough to overcome their extra cost.

Which cars require premium gas?

15 Unexpected Cars That Run On Premium-Grade GasBuick Envision. While the compact Buick Envision’s base 2.5-liter four-cylinder engine runs on regular, the available 2.0-liter turbo-four engine recommends premium-grade gasoline.Buick Regal. … Chevrolet Equinox. … Chevrolet Malibu. … Chevrolet Traverse. … Fiat 500. … Fiat 500L. … Fiat 500X.More items…•

Why is topping off bad?

Topping off your gas tank can cause pressure to build in the tank and flood the carbon filter vapor collection system, only meant for vapor. Subsequently, this overflow can affect your car’s performance and could possibly damage the engine.

Is it good to put 93 gas in your car?

If your car doesn’t require premium, fill up with regular. In a consumer notice, the Federal Trade Commission, notes: “In most cases, using a higher-octane gasoline than your owner’s manual recommends offers absolutely no benefit. It won’t make your car perform better, go faster, get better mileage or run cleaner.”

Is it bad to mix premium and regular gas?

It probably won’t hurt anything. If your car requires regular gas, the blend will have plenty of octane and detergent and may even run a little better or get a bit better mileage. … If your car needs only the lower octane gasoline to run well, you won’t see any advantage in the slightly higher octane of the mixed fuel.