Fuel mix

[Knots]

What is the formula for 2 stroke fuel mix ratios? Now use 50:1 and thinking about maybe 40:1 would be easier on equipment.
Using Stihl Ultra.
Thanks,
Knots

 

[Scrubcadet10]

As good as modern 2 stroke oil is, going to more oil could not be as beneficial as one might think. If your equipment calls for 50:1, mix for 50:1

40:1: For one gallon of gas, you need 3.2 ounces of two-cycle oil
50:1: For one gallon of gas, you need 2.6 ounces of two-cycle oil