DeWalt String Trimmers Use This Gas-Oil Mix.

It’s crucial to use the correct fuel and mix it properly to get the most out of your string trimmers, since their performance may be negatively impacted by using the wrong fuel or outdated gas.

Gas and oil are mixed at a ratio of 50:1 in DeWalt string trimmers. It calls for ethanol concentrations of at least 10% in unleaded gas with an octane value of 89 or higher. Add high-quality 2-cycle engine oil to gas.

Be cautious while adding new gasoline and mixing it with the old. Pressure may build up in a heated fuel tank. Wait for the trimmer to cool for a few minutes before carefully taking off the cover.

outdoorstip Gas and Oil Mix DeWalt String Trimmers

A DeWalt string trimmer with stale gas.

The lack of gas is usually the source of any running issues. Long durations of gas storage in your DeWalt string trimmer may lead to fuel restriction and component damage.

As soon as 30 days after purchase, gas starts to oxidize and break down. Ethanol is added to the majority of gasoline. This is a replacement fuel that is blended with gas to reduce its environmental impact.

Ethanol may be healthier for the environment, but it won’t work in your string trimmer’s little engine. This is because ethanol causes the fuel system to become more prone to condensation.

Fuel lines may get clogged when water and ethanol separate from gas, leaving behind varnish and deposits. Because of this, the trimmer will fire slowly, may die, and may not start at all.

Due to the rapid deterioration of gasoline, it is essential to use new fuel and use it all within 30 days. Add a gasoline additive like Sea Foam Motor Treatment or STA-BIL 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. It’s a staple in the fuel of all my little engine tools.

Fuel for DeWalt string trimmers must be unleaded gasoline with an octane level of 89 or above and no more than 10% ethanol. Before filling the tank, add some 2-cycle premium oil to the gas.

How to Fill a 2-Cycle DeWalt String Trimmer with Gas and Oil

Mixing Gas and Oil for a DeWalt String Trimmer’s Two-Cycle Engine

Before being poured into the fuel tank, gas must be blended with a 2-cycle premium oil for use in DeWalt string trimmers. If you have a 2-cycle string trimmer, you shouldn’t use regular gas in it.

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

In most cases, you will need to buy a new DeWalt string trimmer if you fuel it with pure gas and then turn it on. There’s a chance that the engine is ruined.

Two-cycle DeWalt string trimmers run on a 50:1 gas-to-oil combination. This translates to a ratio of 50 percent gas to 1 percent oil. For a visual guide of how many gallons of oil you’ll need to combine, see the table below.

Use regular unleaded petrol with an octane value of 89 or higher and no more than 10% ethanol to make this blend. Include a high-quality, ISO-L-EGD and JASO M345 FD-approved 2-cycle engine oil.

Please don’t use ordinary motor oil. Two-cycle oil is not the same as conventional motor oil.

Instructions for filling a 2-cycle DeWalt string trimmer with gas and oil

  • 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 gasoline (at least 89 octane and no more than 10% ethanol).
  • The necessary number of ounces of oil may be found in the table below. Two-cycle oil should be added to the gas.
  • Put the cap back on.
  • The gasoline and oil should be gently shaken together to combine them.
  • Fill up the gas tank of the DeWalt string trimmer.

Kawasaki sells a high-quality 2-cycle engine oil that comes in a 2.6-ounce container and should be diluted with one gallon of gas to meet the needed 50:1 ratio.

Gas-Oil Blend for 2-Cycle DeWalt String Trimmers

Oil-to-Gas Proportion1 Gallon Gas2 Gallon Gas2.5 Gallon Gas
50:12.6 oz Oil5.2 oz Oil6.4 oz Oil
Two-Cycle Gasoline/Oil Ratio for DeWalt Tools

DeWalt String Trimmer Premixed 2-Cycle, Alcohol-Free Fuel

An ethanol-free fuel blend is ideal for use in a DeWalt string trimmer since it reduces fuel issues and increases engine life. This oil and gasoline mixture is ethanol-free and ready to be poured into the gas tank of your DeWalt string trimmer.

As was said in the previous section on fuel, you won’t have to worry about the drawbacks of ethanol. You may get TruFuel 50:1 premixed fuel at any home improvement shop or on their website.

Summing Up

Your DeWalt string trimmer’s performance and reliability may both be negatively impacted by the gasoline you put in it. When selecting gasoline for your string trimmer, keep these things in mind:

  • Always fill up with new gas.
  • There shouldn’t be more than 10% ethanol in the gas.
  • Pick gas with a minimum octane rating of 89.
  • Make use of a 50:1 ratio of 2-cycle gas to oil.
  • If you want your gas to last longer without deteriorating, you should use a fuel stabilizer. Fuel stability periods may vary in duration.
  • Never presume gasoline additives will maintain fuel stability for extended periods of time without checking the label first. Unless otherwise specified by the additive manufacturer, stabilized gas should be used within 90 days.