Ethanol Blend vs Premium Fuel for Generators

Fuel words on a generator listing

A generator listing names the fuel early in the title. A gasoline listing states gasoline as the single fuel. A dual fuel listing names gasoline and propane. A tri fuel listing names gasoline, propane, and natural gas. Those words are the stated fuel options, and they are what a buyer compares first.

Ethanol blend and premium are different words. They describe the gasoline itself, not the fuel options of the generator. A listing that says gasoline may not state whether the gasoline is an ethanol blend or a premium grade. The EIA explains gasoline as a fuel made from crude oil and other petroleum liquids. The grade question is separate from the fuel type question.

The difference between fuel types is a shopping question. Fuel types are compared here and dual fuel versus tri fuel is compared here.

Ethanol blend as a word

Ethanol is a renewable fuel that is blended into gasoline sold at many stations. The pump label states the blend, such as a blend containing a percentage of ethanol. A generator listing that says gasoline does not usually state that percentage. The listing name, the bullet list, and the image set are where the seller states the fuel type, not the blend.

Whether a given engine accepts an ethanol blend is a question for the maker's manual. The manual's fuel section states what the unit was designed to run on. This site does not give fuel storage or fuel handling advice; the manual and the maker's page are the sources for those requirements. When comparing generators, treat ethanol blend as a pump word, not a listing word.

Premium fuel as a word

Premium is a grade of gasoline with a higher octane number. Octane describes a fuel's resistance to knock, which is a sound an engine can make under load. A generator listing rarely states an octane number. The maker's product page and the owner's manual are where a premium fuel requirement appears, if one exists.

The listing title may carry the maker's model name, and the model name does not state the fuel grade. The grade is part of the engine's design, and the manual states it. For a buyer, the premium question is answered by reading the maker's page next to the listing, not by comparing one listing title to another.

Who decides the fuel for a generator

The maker decides the fuel. The owner's manual states the fuel type and the gasoline grade the engine was designed for. A listing can name the fuel type without stating a grade. For a gasoline listing, the unit runs on gasoline. For a dual fuel listing, propane is an option on top of gasoline. For a tri fuel listing, natural gas is an option as well. The EIA describes natural gas as a fossil fuel energy source, and the EIA places propane among the hydrocarbon gas liquids, hydrocarbons that occur as gases.

The stated fuel options are what a buyer compares across listings. The grade is what the manual states. Both matter, but they are read in different places. The gasoline generator guide, the dual fuel generator guide, and the tri fuel generator guide are organized by those stated fuel options.

What the listing does not tell you

A listing states what the seller states: the fuel type, the watt figures, the start method, the outlets, and the features. It does not state the octane number, the ethanol content of the gasoline, or the manual's fuel requirements. Compare these stated details:

• Fuel type: gasoline, dual fuel, or tri fuel
• First watt figure in the title, grouped by the site's ranges
• Starting method: electric start or recoil
• RV ready and the outlet set stated on the listing
• Features such as a CO sensor or low oil shutdown

What to compare when shopping

For a buying decision, compare the stated fuel options first. Gasoline is a single fuel. Dual fuel adds propane. Tri fuel adds natural gas. For a camping trip, a small gasoline or dual fuel inverter set may match the situation. For a home on a propane tank, a dual fuel portable or a standby unit that runs on propane may be the comparison to make.

Storm season shopping and job site shopping both start with the same step: read the fuel option in the title. If the title names a single fuel, the listing is a gasoline listing. If it names 2 fuels or 3 fuels, the listing is dual fuel or tri fuel. The manual then states the grade. The inverter generator guide and the portable generator guide group picks by those stated details.

The fuel grade for any of those options is a manual question, not a listing question. Camping generator picks and whole house standby options are organized by stated details, and the manual covers the fuel requirement for each unit.

What to pick for your situation

Questions

Does a generator listing state whether premium fuel is required?

No. A listing names the fuel type, such as gasoline or dual fuel, but it does not state an octane number. The premium fuel question is answered in the owner's manual and on the maker's product page.

What is an ethanol blend?

An ethanol blend is gasoline that contains ethanol, a renewable fuel. A generator listing usually just says gasoline. The pump label states the blend, and the owner's manual states whether the engine accepts it.

Which fuel should I buy for my generator?

The maker's manual decides the fuel type and the gasoline grade. This site compares listings by stated details and cannot name the fuel grade for a specific engine.

Can I compare generators by fuel grade?

No, because listings do not state grades. Compare by the stated fuel options, then read the manual for the grade.

Where do I read the fuel recommendation?

In the owner's manual's fuel section and on the maker's product page, not in the listing title.

Does a dual fuel generator answer the premium gasoline question?

A dual fuel generator adds propane as a second fuel. The gasoline grade question is still answered by the manual.