Last night (31st Aug 2021) at a friends house, my friend decided to start a fire outside, to get the fire going he used some waste engine oil to light it up. I can imagine that stuff had some toxic chemicals in it. 
 

I was there for 20-30 minutes before I'd had enough and left. The wind blew the smoke everywhere, sometimes at me, sometimes not. I often held my breath, but I did inhale a bit. Am I at an increased risk of cancer because of that, or do I have to exposed to that kind of stuff for a long time before I have to worry about anything? I was sat a few meters away from the fire. 
 

Google didn't help lol.