Test if your gas has two cycle oil added or not.

[hemmjo]

I did not even watch the video. WHY would you even bother to test that tiny amount of fuel to see if it has oil? If it has been so long you cannot remember which container has oil, the fuel is too old to be good for your small engine anyway. Mix it with 5 gallons of fresh gas and use it in your car or truck!! Then mix a fresh batch for your saw or whatever.