The correct answer is to locate the owner's manual of the particular saw in question (or call the company) and find out what is recommended. Most chainsaws recommend a 50:1 ratio but some older ones require 40:1. Husqvarna and Stihl also recommend using 89 octane gas (which is usually the middle grade).
Its 4 stroke so 100:0
The ratio for all two stroke garden tools is 50/1 which means 100 ml to 1 gallon
50:1
Does it have valves (4 stroke) 2 stroke has ports Do you have to mix gas/oil (2 stroke)
jonsered oil/gas mixture ratio is 50 to 1.
25 to 1
it's electric...there is no gas
50-1 ratio most definitely.
50:1
40:1
32:1 or 40:1 with high quality 2-stroke oil mix would be fine. http://store.chainsawr.com/
50"1 with the proper oil