Quick Answer: Is It OK To Mix 85 And 87 Gas?

Does 87 or 89 get better gas mileage?

Slightly better fuel economy is there, but it’s not worth the huge price gap from regular to premium.” Most gas stations offer three octane levels: regular (about 87), mid-grade (about 89) and premium (91 to 93).

The higher the octane, the greater resistance the fuel has to pinging during combustion..

What is 85 octane gas used for?

Low-octane fuel — rated 85 or 86 as opposed to the 87 for regular gasoline — is common in the Rocky Mountain states, said General Motors fuel specialist Bill Studzinski. The practice goes back to the days of carbureted engines, when lower octane helped vehicles run smoothly at altitude.

Will higher octane gas hurt my car?

Unless your engine is knocking, buying higher octane gasoline is a waste of money. … 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.

Which gas is better 87 89 or 93?

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.

Does 87 octane damage engine?

“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.

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.

Why does Colorado use 85 octane gas?

Octane Ratings At Altitude Because the air is less dense, less air flows to your car’s engine. This translates to a slightly richer air-fuel ratio, and deters engine knock. For that reason, you’ll find that regular gas carries an 85 octane rating here in Denver and throughout Colorado, Wyoming, Utah and Montana.

What gas last the longest?

Find out when and why to get rid of stored gasoline—and how to revive old fuel to power your equipment and vehicles.Properly stored gasoline can last up to half a year. … Ethanol-blended gas lasts up to three months. … Pure gasoline keeps for at least six months. … Fuel-stabilized gasoline keeps for one to three years.More items…

What happens if you mix premium and regular gas?

Mixing fuels of two different octanes will result in a tank of fuel with an octane rating somewhere between the two fuels, depending on the amounts of each. That said, if your vehicle requires premium fuel, it’s a good idea to top it off with the good stuff as soon as you’re able.

Is premium gas really worth it?

Typically, high-performance cars require premium, because their engines have higher compression ratios, while other cars can run just fine on lower octane gas. … The FTC sums it up this way: “In most cases, using a higher octane gasoline than your owner’s manual recommends offers absolutely no benefit.”

Which cars require premium gas?

15 ‘Regular’ Cars That Take Premium FuelBuick Envision (with 2.0L turbo)Buick Regal (all models)Buick Regal TourX (all models)Chevrolet Equinox (with 2.0-L turbo)Chevrolet Malibu (with 2.0-L turbo)Fiat 500L (all models)GMC Terrain (with 2.0-L turbo)Honda Civic (with 1.5-L turbo)More items…•

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 mix 87 and 91 gas?

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.

What happens if you put 85 gas in a 87 car?

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 85 octane at altitude the same as 87?

Research several years ago from the American Petroleum Institute showed that lower air pressure at higher altitudes allows vehicles to perform as well with 85 octane as they would with 87 at lower altitudes. … Many car manufacturers recommend that motorists use at least 87 octane.