Before I show you how to mix chainsaw fuel, I wanted to make you aware that I have several chainsaw buying guides to help you find the perfect tool for your needs. Additional Tips on Mixing Chainsaw Gas.Never mix gas and oil in the tank of the chainsaw. I hope you enjoyed this post on how to mix chainsaw gas.
Husq: “Thank you for contacting Husqvarna. The best fuel/oil mix will be the 50:1 ratio using quality 2 cycle oil that is designed for chainsaws, and use fresh fuel, 89-93 octane for best performance.” The 50:1 ratios are recommended because the modern two-stroke oils have better additives to prevent ring sticking and piston seizure than the oils used 20 years ago. Ianab intresting what ya say about ya new saw my 109 is ment to be 40-1 my 120Si is 25-1 and my PS 9010 40-1 or higher if useing “brand oil’s” i have run all these on 100 -1 race oils tho i think a lot depends on oil spec than mix rates catch ya JD. I used to smoke camels but found them hard to light and kicked to much.
To achieve a 50 to 1 oil mix ratio, you will need to mix 2.6 ounces of oil in one gallon of gasoline. There is no need to worry about using 40 to 1 instead of 50 to 1 oil mix because it is also according to the EPA standard, and there is not much difference between their ratios. 50 to 1 oil mix is a little bit more costly than 40 to 1.
Distributers in the midwest had to buy oil from a refinery/bottler in the midwest…east coast distributors had to buy from the east, and west coast were prevented from ordering from any other place than the west…anyway,,,thats for a different thread. Now.back in Sweden, engineering was faced with the task of keeping warranties down to an acceptable level with an extended term offered. As you mention, the difference is not very much when you figure the volume of oil in 1 charge of the cylinder fuel mix…but what happens is a little oil is left in the combustion chamber unburned…and compound that with rpms and time…and it quickly builds up. Conversely , a lower oil volume builds up much less quickly, so , with extra oil and the resultant cooking of this oil on the hot piston( also as you mentioned, the piston is the real hot surface in there) and begins to build up on the piston walls…usually right below the rings…many of you have seen this varnish looking brown “Painted” on the piston below the rings on the piston.
The larger number represents the amount of gasoline, while the smaller is the amount of oil needed. If you are treating 1 gallon of clean unleaded gasoline, a 50:1 ration translates to 2.5 ounces of two-cycle oil, while preparing a 40:1 blend calls for 3 ounces of oil. It’s best to use the premixed gas within a few days and to shake it well anytime it’s been sitting for a while to redistribute the oil completely into the gas.
chainsaw 40 1 ratio Related Question:
How do you mix a 40 to 1 ratio?
Use a 40:1 two-cycle oil mix ratio. One gallon of gasoline combined with 3.2 oz of two-cycle engine oil. Unsure of the age of your equipment? Use the 40:1 mixture.
Can I use 40/1 In my chainsaw?
Can I Run 40/1 In My Stihl Chainsaw? It is fine to use the same modern oil at 40:1 as well. Your OPE should always be properly tuned, as always. Oil concentrations in your saw will help protect your engine if you use it for heavy duty work such as milling.
What ratio should I run my chainsaw?
Most 2-stroke chainsaws recommend a 50:1 chainsaw oil mix ratio. But some recommend 40:1. Older two-stroke equipment might even call for 32:1.
Does 40 to 1 have more oil than 50 to 1?
The 40:1 ratio has more oil compared to gas. That’s why 40:1 oil is slightly denser than 50:1 oil. This higher density helps with the lubrication of the engine. Because of that, the 40:1 ratio has better lubrication of the two.