Question 807496
I want to mix 1liter ofgas at 50 to 1 mixture. How many milliliters of oil do I put in. 
-------------
1 liter = 1000 ml
1000/50 = 20 ml
Add 20 ml of oil --> 1020 ml of mixture
----------------
If you want 1000 ml of the mixture:
L = amount of oil
L + 50L = 1000
L = 1000/51 =~ 19.6 ml of oil
980.4 ml of gas
----------------------
Roundoff errors --> 50.02 to 1
-----
Using 20 & 980 gives a 49 to 1 mix
Close enough for any 2-cycle engine