Need to make 50:1 ratio mix. what i have on hand is the poulin 3.2 fluid ounce that makes 1 gallon at 40:1. how many ounces of this mix would need to be used to achieve the 50:1 mix ratio.

The exact mix ratio for Cub Cadet trimmers varies, depending upon the exact model. Cub Cadet's ST 228 2-cycle trimmer model uses a mix of 2.6 fluid ounces of 2-cycle oil blended with 1 gallon of unleaded gasoline or a 50-to-1 ratio. This equates to 20 milliliters of 2-cycle oil to 1 liter of gas. The Cub Cadet BC 210, on the other hand, requires a mix ratio of 40 to 1, or 3.2 fluid ounces of 2-cycle engine oil to 1 gallon of unleaded gasoline

the mix is 50:1 so the weight to volume will not matter
if you have a 1 gallon tin the amount of oil will be 1/50 of the gallon
1 gallon =128 oz so a ratio of 50: 1 would be 1 gallon of fuel to 2.6 oz of oil or 1/50 of the gallon calculate the oil required by dividing 128 by the recommended ratio figure (128 divided by 20 or 30 or 40 or 50 to get the oz amount of oil)
the thing is that the mix doesn't have to be exact as long as it is not tool short on the oil
so a mix ratio of between 30:1 to 50:1 will run in 2 stroke engines but a mix of 60:1 will cause problems
A good mix is when you can see a faint oil smoke when operating
too muck smoke and there is too much oil and no smoke too little oil
the major factor is--- do not use e-mix fuels

if its 2 cycle the mixture can be several mixes. it should say on the machine. here are the following mixtures that I have- 16-1, 1 gallon of gas to 8 ounces of oil. 32-1, 4 ounces per gallon. 50-1
3 ounces per gallon and 100-1 2 ounces per gallon . most of my 2 cycles are 50-1. hope this helps.

Hi anon, the usual ratio for most 2 stroke engines is 40:1. The 1 being two stroke oil

50 parts gas to 1 part oil = one imperial gallon = 160 imperial ounces (fluid) 50 divides into 160 / 3.2 times since a std 2 cycle oil container is 7 imperial ounces you'll need two and four tenths containers of oil for a gallon of petrol ???

240ml

for a 40/1 mixture use 3 ounces of oil ( 2 stroke) to a gallon of gas for a 50/1 ( which is what I recommend ) its 2.5 ounces to each gallon of gas, if you find that the machine is smoking a little too much,, back up on the oil just a hair,, but I don't think you'll need to

Hello George:
I cannot find an OM for your saw. I did find 3 IPLs the oldest being 1993. I have 2 McCulloch (1983 & 87) saws both older than yours and their OMs recommend the current mix ratio of 40:1
Oil Mix Ratio:
The following ratios have been recommended for the last 10-15 years.
Dolmar, Echo, Efco, Homelite, Husqvarna, Jonsered, Makita, Oleo-Mac, Red Max, Ryobi, Shindaiwa, Solo, Spear & Jackson, Stihl & Tanaka; all recommend 50:1.
• 1 gallon of premium fuel to 2.6 ounces of quality 2-cycle oil.
• 4 liters of premium fuel to 80 milliliters of quality 2-cycle oil.
McCulloch, Poulan & Wen; recommend 40:1.
• 1 gallon of premium fuel to 3.2 ounces of quality 2-cycle oil.
• 4 liters of premium fuel to 100 milliliters of quality 2-cycle oil.
Chinese chainsaws recommend 25:1.

If you have more questions or need additional help please reply below and I will get back to you. HTH & Good Luck.
Lou
Thank You for using FixYa.

40:1(gasoline:oil) ratio requires 3 ounces of oil.

50:1(gasoline:oil) ratio requires 2.6 ounces of oil.

So for you to change to 40:1 you need to add .6 ounces of oil

4 to 6 oz.is plenty