fissure

So I was being pretty absentminded earlier today while mI was mowing the lawn, the lawnmower stopped, I figured it was the gas so I got some gas and put about 1-2 litres into the engine oil tank by mistake.  I flipped it upside down to try and empty the engine oil tank but nothing came out.  I havent tried starting the mower up again in fear of it blowing up or catching on fire or something equally dangerous.  Any ideas on what I should do?