Gas and Oil Mix for Homelite String Trimmers

Keeping the trimmer in good working order and possibly avoiding engine damage can be achieved by choosing the right gas and utilizing the correct fuel-to-oil combination.

Homelite string trimmers require a 50:1 ratio of gas to oil. Premium 2-cycle engine oil is blended with unleaded gasoline that has an octane rating of at least 87 and contains no more than 10% ethanol.

Before adding gasoline, make sure the area surrounding the cap has been cleaned. Wait a few minutes for the string trimmer to cool down, then carefully remove the fuel cover. Keep working in an open space with plenty of airflow.

mixtureBefore diagnosing, repairing, or operating, be sure you’ve read and understood all of the safety recommendations in the equipment’s operator’s manual.If you lack the expertise, experience, or physical ability to complete the repair safely, you should seek the advice of a professional.

A Homelite String Trimmer with Stale Gas

You shouldn’t store fuel for your Homelite trimmer for more than 30 days at a time. This is because after this point in time, gas begins to decompose.

String trimmers are susceptible to damage from ethanol, an alternative environmentally friendly fuel added to most gasoline. Water vapor from the atmosphere is attracted to ethanol.

Over time, the gas will settle out of this ethanol-and-water blend. Because of the varnish it leaves behind, the trimmer’s fuel flow is restricted and its parts deteriorate.

When it does, it sinks to the bottom of the tank and sends a blast of intense heat to the motor.

Gas quickly goes bad, so it’s best to use it up within 30 days of purchase. Add a fuel additive, such as Sea Foam Motor Treatment, if you can’t use it up that fast.

This solution will prevent gas from going bad as quickly by eliminating moisture and stabilizing it. You can also determine if the oil you use in the gas has a stabilizer that works over the long term. (Check the date on the container; fuel stabilizers in oil can extend its shelf life by 30 days to 2 years).

Unleaded gasoline with an octane rating of 87 or higher and no more than 10% ethanol is recommended for use in Homelite string trimmers. Before pouring the gas into the fuel port, mix with a 2-cycle premium oil.

Do not use any gasoline with an ethanol level more than 10%, such as E15, E30, or E85. These fuels have between 15 and 30 percent ethanol and 85 percent ethanol.

You will have fewer problems related to stale fuel if you switch to an ethanol-free fuel. TruFuel 50:1 Premix and other ethanol-free fuels are available at hardware stores and online.

Recreational gasoline (REC-90) can be purchased at some gas stations. Visit to locate a gas station in your area.

Two-Cycle Homelite String Trimmer Fuel and Oil

Blending Gas and Oil for a Homelite String Trimmer’s Two-Cycle Engine

Before filling the fuel tank of a Homelite string trimmer with gas, a 2-cycle premium oil must be added. If you have a 2-cycle string trimmer, you shouldn’t put pure gas in it. You should not make this choice.

If you put straight gas into the tank, the engine will seize. The engine’s internal parts won’t be able to move smoothly without the oil that is added to the gas as a lubricant.

You will probably have to buy a new Homelite string trimmer if you start it up after adding pure gas. There will be harm to the engine.

Two-cycle string trimmers by Homelite require a 50:1 ratio of gas to oil. To achieve this result, blend 50 parts gasoline with 1 part vegetable oil. For a visual guide to how many gallons of oil you’ll need to combine, see the table below.

Use regular unleaded gas with an octane value of 87 or higher and no more than 10% ethanol to make this blend. Put in some ISO-L-EGD and JASO M345 FD approved 2-cycle premium oil.

Two-cycle engine oil is different from conventional motor oil.

Instructions for filling a 2-cycle Homelite string trimmer with gas and ooil

  • Prepare the correct amount of fuel mix by consulting the table below.
  • Take the top off a legal gas container. Fill a gas can with unleaded fuel (at least 87 octane and no more than 10% ethanol).
  • The necessary number of ounces of oil can be found in the table below. Put the 2-cycle oil into the gas container.
  • Put the cap back on.
  • The fuel and oil should be gently shaken together to combine them.
  • Put more gas into the Homelite string trimmer.

Ethanol Shield 2-cycle oil is what you want to use, according to Homelite. Kawasaki’s 2-cycle hybrid is another viable option. Bottles of 5.2 and 6.4 ounces can be diluted with 2 and 2.5 gallons of gas, respectively, to create a 50:1 mixture.

Blending Gas and Oil for a Homelite 2 Cycle String Trimmer

Fuel-Oil-Blend Percentage1 Gal Gas2 Gal Gas2.5 Gal Gas
50:12.6 oz Oil5.2 oz Oil6.4 oz Oil

Ethanol-Free 2-Cycle Premixed Fuel for Homelite String Trimmer

Using an ethanol-free gasoline blend in your Homelite string trimmer will decrease fuel problems and increase engine life. Ready to use in your Homelite string trimmer, this oil and fuel blend contains no ethanol.

You won’t have to worry about ethanol’s drawbacks, as mentioned above in the fuel section. Premixed fuels at a ratio of 50:1 are widely available from internet retailers and hardware stores.

To sum up

The quality of the fuel used in your Homelite string trimmer has a direct impact on its performance and the likelihood that it will experience issues with its fuel system or engine. Choosing the right fuel for your string trimmer is easy if you keep in mind these guidelines:

  • Don’t ever use old gas.
  • Ethanol content in the gas shouldn’t exceed 10%.
  • Pick fuel with at least an 89 octane rating.
  • Make use of a 50:1 ratio of 2-cycle gas to oil.
  • You can keep your gas in good condition for longer by adding a fuel stabilizer to it. The lifespan of stabilizers varies widely. Sea Foam Motor Treatment is one brand of gasoline stabilizer that can prolong the fuel’s shelf life by up to 2 years.