WOW! DANGER WILL ROBINSON!!!!!!!!! And bad for rubber!
My dad thought gasoline was great stuff for killing germs. He grew up in the Missouri Ozarks where he walked to school miles in the snow during the winter without any shoes (stop me if you have heard this story before
). He told me once that he stepped on a big nail that went right through his foot. His dad (a Missouri Ozarks rock farmer) was concerned about these new things called germs that he had just heard about and soaked my dad's foot in a tub of gasoline to kill them. Apparently, it did kill them. I guess it was a good thing that my dad wasn't smoking at the time as he still had his foot when he was alive. Unfortunately, he never gave up on smoking and that caused him to meet an early death.
Anyway, the moral of the story is to not use gasoline to clean anything, be it a chain or a foot. And I wouldn't recommend smoking either, especially when cleaning your chain with gasoline.
If you want to clean something oily, you are better off with kerosene - or WD40 and an old toothbrush.