How To Mix Gas And Oil For Weed Eater (Easy Guide)

How To Mix Gas And Oil For Weed Eater (Easy Guide)

If you have a garden or a lawn, you must invest in a good weed eater, which you can use in trimming the grass and giving your home a good look ( this is precisely what a good haircut does for a man). If you want to use this weed eater for longer, you must care for them properly.

Mixing the gas and oil in proportion is one way to get the best from your weed eater. The most common ratio of gas to oil mixture is 50:1 and 40:1, depending on the product. It might seem a little tricky to calculate. However, it’s something other than basic math.

How To Mix Gas And Oil For Weed eater (Easy Guide)


How To Mix Gas And Oil For  Weed eater

We are going to plunge straight into the business of the day.

If you have invested quite a reasonable amount of money in buying your weed eater, you surely want to use every cent of it. Hence, it is essential that you don’t only get the best oil for mixing the gas but that you also mix it in the correct ratio. It will preserve your weed eater as well as prevent any accidents from occurring as you .ow your lawn.

These are the steps to follow in mixing the gas and oil for your weed eater.

1. Get The Manufacturer’s manual

Read the manufacturer’s manual to understand the machine you just got and the ratio of gas and oil you need for the weed eater. That might not seem important, but this precaution saved many people from damaging their weed eater and hurting themselves. If there is any issue that needs to be clarified for you, you should contact the salesperson or the manufacturer, or better still. You can quickly search the Internet.

The standard ratio of gas to oil for most weed eaters is 50:1 and 40:1. To get the exact quantity of gas and oil to use in your machine, you might have to do some calculations. Usually, the gas is in liters while the oil is in milliliters. Hence you will need to convert the gas into milliliters too.

So, for instance, if the ratio of gas to oil for your weed eater is 40:1 and you have a 5-liter container of gas, then you will have to convert 5 liters to milliliters by multiplying by 1000

Hence 5 litres= 5 × 1000

Which is 5000 ml

Since the ratio of gas to oil is 40:1, it then means you will have to divide 5000 by 40

5000/40= 125

That means that for that 5 liters of gas, you will need 125 milliliters of oil.

You can use this formula to calculate any quantity of gas and oil.

2. Get All The Materials You Will Need

Now that you know what proportion of gas and oil you need, the next thing to do is get all the materials you need. These materials include:

i, Gasoline: now, if you want to use your weed eater for longer, you should buy premium unleaded gasoline. Yes, we know it is not cheap, but the idea is to save money in the long run that you would have spent on replacing the weed eater sooner if you used cheap fuel.

ii, Mixing oil: since you are going for premium gasoline, you could go all out by buying premium two-cycle motor oil. Boat or automotive engine oil can damage your weed eater, so steer clear from them.

iii, Containers: not all containers are meant for storing fuel. It is best to use metal containers or jerry cans. However, Jerry cans have the advantage that they are plastic and lighter, and neither do they rust. A container with an extended nozzle and a quality lid is ideal, so the fumes will not come out as you mix the gas and oil.

3. Now mix the gas and oil

If you have gotten the correct quantity of gas you want mixed with oil, check the indicator on your container before pouring in the gasoline. Ensure you leave room for the gas and oil to mix by filling the container appropriately.

Mix the two liquids in the correct ratio and shake the container lightly to ensure the gas and oil mix ideally. Using a roundabout motion to shake the mixture, keep the liquid from leaking from the nozzle.

Keep This In Mind

You must only store the gas and oil mixture for three months so that it doesn’t degrade. Mixing the quantity you want to use at any given time is best.

You should always ensure that you only use a suitable container for mixing and storing gas, as this is a potential fire hazard. The containers must be stable as it sits, appropriately covered, and kept away from anything that can cause a spark.

If you can help it, never store gasoline as it is a very flammable liquid, and if you must, ensure you store it well in a safe place.

Frequently Asked Questions About Weed eater

Weed Eater Gas Mix

Why Can’t I Use Just Gas For My Weed eater?

Many engines, like generators, have different compartments or reservoirs for gas and oil, but most weed eater 2-cycle products have only one reservoir for the gas and oil mixed. The oil is for lubricating the engine; if there is no oil on the engine, the engine can get damaged in just a few minutes.

Does The Grade Of the Gas Matter?

Yes, the grade of gas you use will determine the length of the useful life of your weed eater. The 87 octanes of regular unleaded gasoline are used for most Weed eaters, you can also use gasoline blended with a maximum of 10% alcohol, but you should never use E85 or diesel fuels.

Can I leave fuel stored in my Weed eater?

Storing fuel in your Weed eater is not okay because gum deposits can form in the fuel system. Hence if you have had gas in your Weed eater for over a month, drain the fuel tank and re-tighten the cap. Afterward, start the Weed eater and let it run until it stops to ensure all the gas is used up.

What Can Possibly Stop My Weed eater Engine From Starting?

If the engine of your Weed eater refuses to start, it means that something is responsible for that. You can troubleshoot for the fault by doing the following:

1. Check if there is gasoline in the reservoir, and you must be sure that the gas and oil mixture is ideal and that the fuel mixture has stayed for a short time.

2. Ensure that your engine is switched on.

3. Usually, the Gap in the spark plugs should be 0.025″, but if the gap in the spark plugs is not adequate, it will also cause the engine not to start, so you will have to remove the spark plug and clean the electrode with a small wire brush. You should replace the plug if the spark plug electrode is wet with gasoline.

4. Check the air cleaner; if it is dirty, you should use warm soapy water to clean it and allow it to dry before you fix it.

5. Ensure the fuel filter is clean because you don’t want dirt and debris clogging it.

6. The engine can be flooded with fuel by doing all these checks. You might even perceive the smell of fuel. All you need do is set the Weed eater aside so that the fuel might vaporize. The engine will start after about 20 minutes, but you must get a professional to check it if it doesn’t.

How often should The Air Filter Be Cleaned?

You should clean the air filter of your weed eater as often as possible. For instance, you can clean some units after every 5 hours of use. You only need to wash it with warm soapy water to clean it. Afterward, rinse it and allow it to dry. Before installing it back, add a few drops of oil to the filter.

How Do I Locate The Fuel Filter In My Weed eater?

Most, if not all, gasoline engines usually have their fuel filters on the end of the fuel line in the fuel tank.

How Often Should I Change My Fuel Filter?

The recommendation is to change your Weed eater’s fuel filter at least once a year. Before removing the filter, you should drain the fuel from the unit first, pull the filter from the tank through the gas tank opening, remove it from the line, and then fix the new filter on the fuel line.


Your weed eater is a piece of critical machinery that takes care of your lawn. They are easy to operate and as efficient and durable as you let them be. One way to keep using your weed eater for a long time is to mix the right amount of oil into the gasoline that powers the engine.

Helpful links:

Most engine manufacturers recommend that a 40:1 ratio of gas and oil be used, while for some, it is 50:1. Sticking to this ratio will give your weed eater a longer useful life.

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