How to mix chainsaw gas

Gas being poured into chainsaw
(Image credit: Getty Images)

Want to take the graft out of the toughest DIY jobs? Whether you’re chopping firewood or felling a tree, a chainsaw is essential. To get the most out of your device, you’ll need to maintain it correctly. Here, you’ll learn how to mix chainsaw gas properly to keep your device in top condition.

Whether you’re a newbie or a pro, you’ll need to mix chainsaw gas at regular intervals, so it’s worth honing your skills. If you get the ratios wrong, you may experience issues ranging from poor performance to overheating, which can lead to costly repairs.

We’ve consulted an expert about how to mix chainsaw gas for the best results. You’ll learn how to achieve the perfect balance of gas to oil. 

You may like

Looking for a chainsaw that’s a cut above the competition? Our round-up of the best chainsaws includes top-rated gas and electric models.

For now, let’s take a closer look at how to mix chainsaw gas.

How to mix chainsaw gas

Rick Jason Martineau
Rick Jason Martineau

Rick Jason Martineau has over five years of experience at Husqvarna Group and is currently the Senior Training Specialist for Tree Professional Products, Safety, and Advocacy for North America. He has had the privilege of being involved in the forest industry for over 40 years.

Want to learn how to mix chainsaw gas? Here’s our step-by-step guide.

1. Select gas and oil

First, pick the correct fuel. For best results, opt for a high-quality fuel with low ethanol content. While it may be tempting to settle for the cheapest option, it can damage your chainsaw in the long run. “Use non-ethanol fuel or if that’s not available, use the highest octane at the pump, usually 92 or 93,” says Rick Jason Martineau, Senior Training Specialist for Tree Professional Products at Husqvarna

It’s crucial to use 2-stroke oil for your chainsaw. Never use 4-stroke motor oil, as it can damage the engine.

2. Find a suitable container

Use a clean container to mix your fuel to avoid contamination. “Never mix the fuel in the tank, as it won’t be accurate and could cause permanent damage,” cautions Rick.

3. Mix the fuel and gas

Check your manual for guidance on proportions. In most cases, the golden ratio of fuel to oil is 50:1. “Use a fuel amount that you will use completely in less than 30 days, preferably one gallon at a time,” advises Rick. This is because fuel has a limited shelf life.

Pour half of the total gas into your container. Add the oil and shake. Next, incorporate the remaining gas. 

4. Re-fuel your chainsaw

Wipe the area around the fuel cap to prevent debris from falling inside. Open the fuel cap gently as pressure may have accumulated. Carefully pour the fuel into your chainsaw. 

Discover more guides for the garden…

Best leaf blowers
Best pressure washers
Cheap chainsaw deals

Louise Bond

Louise Bond is a UK-based writer and the founder of The Cove Copy. She has been published in The Guardian, Breathe, Fit & Well, Top Ten Reviews, and more. When she’s not writing, you can usually find her out in nature, whether hiking in the woods or pottering in the garden. 

With contributions from
Read more
Best chainsaws
Best chainsaws: top picks for efficient cutting, power options, and safety features
echo vs husqvarna
Husqvarna vs. ECHO chainsaws: which brand is preferred by pros and customers?
Troy-Bilt XP 21 in. 163 cc Briggs and Stratton ReadyStart Engine 3-in-1 Gas RWD Self Propelled TB310B Lawn Mower
Best gas lawn mowers: for power, performance, and durability
Ninja Woodfire Outdoor Grill & Smoker
Gas grills vs. electric grills: which is right for you?
Laundry in the drum of a washing machine
How to wash clothes in a washing machine (with expert tips)
How to clean a dishwasher: Image shows a dishwasher stacked with plates
How to clean a dishwasher: keep your dishes fresh, sparkly, and odor-free
Latest in Home & Garden
What does energy efficient mean?
Do washing machines use a lot of electricity?
Testing the Echo TC-210 Tiller in grass
Rear tine tiller vs front tine: which is better?
The Troy-Bilt Colt tiller is perfect for any type of garden bed.
Tiller vs aerator: which one has the edge?
Coleman RoadTrip X-cursion LXE being ignited by writer during testing
Gas grills vs. pellet grills: which is right for you?
Ninja Woodfire Outdoor Grill & Smoker
Gas grills vs. electric grills: which is right for you?
samsung vs lg washer dryers
LG vs Samsung washer dryer combo: which is right for you?
Latest in Feature
Things you shouldn't put in a dishwasher
Do dishwashers use a lot of electricity?
What does energy efficient mean?
Do washing machines use a lot of electricity?
Best Dishwasher
Bosch vs Miele dishwashers: which is right for you?
Shopping for dishwasher
Are all dishwashers the same size? Everything you need to know
Testing the Echo TC-210 Tiller in grass
Rear tine tiller vs front tine: which is better?
The Troy-Bilt Colt tiller is perfect for any type of garden bed.
Tiller vs aerator: which one has the edge?