Does 91 gas have ethanol?

Asked By: Rhita Goedecken | Last Updated: 26th June, 2020
Category: automotive green vehicles
4.7/5 (103 Views . 20 Votes)
No. All gasoline brands have both pure and ethanol-containing gasoline under the same brand names. For example, Shell V-Power ranges from 91 to 93 octane both with and without added ethanol. It just varies from station to station, and it's up to the station owner whether or not to sell pure gas.

Click to see full answer


Then, does unleaded 91 contain ethanol?

The numbers are what matters: Standard unleaded petrol is 91. Premium unleaded is both 95 and 98. The ethanol-blended E10 (a mixture of up to 10% ethanol in petrol) is a substitute for 91 in most cars.

Subsequently, question is, what gas is ethanol free? The short answer is, no, ethanol-free gasoline is not bad for your car. Most cars today can run on ethanol gas blends up to E15 (15% ethanol) and on non-ethanol gasoline. And flex fuel vehicles can handle up to E85 (85% ethanol) without a problem.

Correspondingly, does all gas have ethanol?

Almost all gasoline now has some ethanol in it. Our Exxon and Mobil branded gasoline currently contains up to 10%. Gasoline with 10% ethanol content is known as E10, and with 15% ethanol it's known as E15. Ethanol flex fuel (formerly known as E85) has between 51 and 83% ethanol with the remainder being gasoline.

How can you tell if gas is ethanol free?

To determine if ethanol is in the gas:

  1. On a test tube or olive bottle six or seven inches long, make a permanent line about two inches from the bottom.
  2. Fill with water to this line, then fill the tube to the top with gasoline.
  3. Cover the tube, agitate it, and let it stand.

36 Related Question Answers Found

Is unleaded 91 bad?

If, for example, your car says ”premium 95′, then it is not acceptable to use unleaded 91, as doing so can cause damage, engine failure and even an explosion. This isn't guaranteed to happen of course, but you will probably experience a loss of power, acceleration and fuel economy over time.

What is the difference between unleaded 91 and 98?

Standard unleaded petrol is 91. Premium unleaded is both 95 and 98. The ethanol-blended E10 (a mixture of up to 10 per cent ethanol in petrol) is a substitute for 91 in most cars 2005ish or newer. If you open the fuel flap of your car and it says 'unleaded petrol only' it means 91 octane fuel is OK.

What happens if you put 95 instead of 91?

It can't hurt your engine if you use a higher octane fuel. So, for example, if you use 95 or 98 in an engine designed for 91, that's OK. However, it's not acceptable to put in a lower octane fuel than the minimum recommended by the manufacturer.

Is there ethanol in Shell V Power?

The previously obtainable higher grade V-Power Racing which contained 5% ethanol to boost V-Power's octane rating to 100 RON has now been phased out by Shell due to a "changing market". In the United States (U.S.), at around 2004, all U.S. Shell "Premium" gas was rebranded as "V-Power".

Which is better 95 or 98 octane?


The main difference between 95 petrol and 98 petrol is 'knock' resistance. 95 petrol works as well, but if your engine is powerful, it will use higher pressures that 95 petrol may not be able to withstand. If you want to be on the safe side, 98 petrol will offer your engine better protection.

Is special unleaded 91?

Special Unleaded 91 (91 Octane) that helps to improve fuel economy, emissions and provides corrosion protection. Special E10 94 (94 Octane) contains up to 10% Ethanol that helps to improve fuel economy, emissions and provides corrosion protection.

What's the difference between e10 and unleaded 91?

E10 vs Unleaded
The key difference between E10 and unleaded is E10 is made up of 90 per cent unleaded with a blend of 10 percent ethanol content. The battle of E10 vs 91 fuels is largely over as E10 has mostly replaced the more expensive 91 unleaded.

What percent of ethanol is in premium gas?

E10 is gasoline with 10% ethanol content. E15 is gasoline with 15% ethanol content, and E85 is a fuel that may contain up to 85% fuel ethanol. The ethanol content of most of the motor gasoline sold in the United States does not exceed 10% by volume.

Is premium gas ethanol free?

Is Premium or Regular Fuel Best for Small Engines? Some people fill their small engines with premium gas based on the mistaken notion that all premium gas is ethanol free or that it'll help the engine run better. In fact, 95 percent of all gas sold in the United States (regular, mid-grade and premium) contains ethanol.

How do you remove ethanol from gas?


Typically, it's done by splash blending in fuel trucks. The ethanol itself is trucked in by big rig or rail car (since it can't go through the same pipelines as other parts of the fuel). Once it is blended into gasoline, there's no feasible way to separate ethanol from the gasoline.

When did they start putting ethanol in gas?

The first ethanol blended with gasoline for use as an octane booster occurred in the 1920s and 1930s, and was in high demand during World War II because of fuel shortages.

Is ethanol free gasoline better?

For the most part, ethanol doesn't affect you very much. Yes, you might get a little bit better mileage and performance with pure gasoline, but not enough to offset the cost of buying non-ethanol gas if it's available in your region. According to the U.S. government, all gasoline-powered vehicles can use E10 safely.

Is ethanol a gas or liquid?

At room and body temperatures, ethanol can exist as a liquid or a gas. Liquid – individual ethanol molecules are tethered to one another by two types of chemical forces: hydrogen bonds and Van der Waals forces.

Is ethanol free gas better for lawn mowers?


E10 fuels are approved for usage in lawn mowers and outdoor power handhelds like chainsaws, trimmers, and leaf blowers. Gas with higher concentrations of ethanol is not. Ethanol will start to absorb water over time, leading to poor engine performance. E10 gas absorbs up to 50 times more water than standard gasoline.

Why is ethanol bad for small engines?

Ethanol acts as a solvent in older engines and can dissolve old gum and varnish deposits from the gas tank and fuel lines. These deposits can then clog the very small orifices in the carburetor.

Is ethanol the same as alcohol?

Ethanol (C2H6O), the alcohol in alcohol beverages, sometimes just called “alcohol.” Isopropyl alcohol (C3H8O) is used as a solvent or fuel. Ethanol produced for other non-beverage purposes may contain additives and should not be consumed.