What would happen if you add 2 stroke instead of 4 stroke to mower?

2 stroke gas/oil mix? it will run fine, might smoke some due to burning some oil. just dont run reg gas w/o oil in a 4 stroke. I wouldnt run 2 stroke mix in a 4 stroke all the time, but is fine in a pinch (ive done it in my quad, after running out on a ride and got enough to get back from a guy w/ a zilla)