Question: Does Higher Octane Run Cooler?

What happens if you use 89 octane instead of 87?

Using a higher octane than necessary If you opt for a higher octane than your manual recommends—say, 89 instead of 87—your car will be perfectly fine, an article on AAMCO’s blog explains.

It will not, however, improve your car’s mileage or give it any sort of extra performance boost, according to Car Talk..

Is it OK to mix 89 and 93 gas?

No, you will not damage your engine by mixing different octane fuel. It is still fuel. Say you mixed 2 gallons of 87 octane with 2 gallons of 89 octane and 2 gallons of 93 octane.

Does premium gas run cooler?

higher octane gas will make your engine run cooler. temperature does not ignite it, spark does.

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.

What happens if you put 93 instead of 87?

If you usually fill your tank up with 87-octane gasoline and you accidentally put in a higher octane blend (say, 91, 92, or 93), don’t worry. … You may feel a difference in the way the vehicle runs and may notice an improvement in gas mileage, but that’s about all that will happen.

Is 100 octane fuel safe?

High octane race fuel is sort of the same way. Nitro won’t even burn unless it’s compressed. You can literally put a match out in it, but under compression, it’s a whole other story! … If you have 10:1 – 11:1, you can run up to about 100 octane and be fine, but if you have in the 9:1 area, don’t even bother.

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.

Can you run too high octane?

If you run too much octane in your engine it won’t run very well because the burn is way too slow. … If the octane is too low, the fuel will burn too fast and too hot which causes detonation and leads to sure-fire engine damage.

Which is better 91 octane or 95 octane?

The general rule of thumb is: the difference in fuel efficiency is about 1% per octane rating – 91 and 95 unleaded fuels, for example, have roughly a 4% difference. If there is a lesser price difference between the two, then its highly likely that its worth switching.

Is it better to run higher octane?

But take note: the recommended gasoline for most cars is regular octane. 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.

Does higher octane gas burn slower?

Octane does not offer any better fuel mileage, increase engine horsepower, or make the engine start quicker. … Because higher octane gas burns slower, it is more resistant to knock when subjected to higher RPM and cylinder pressures.

Which is better high octane or low octane?

Regular gas is rated at 87 octane in most states, while premium gas is often rated higher at 91 or 93. Fuel with a higher octane rating can stand up to higher compression before it detonates. Essentially, the higher the octane rating, the lower the likelihood that detonation happens at the wrong time.