Blowtorch and frying oil - dangerous?
Rapeseed oil (aka canola for those across the pond) has a high burning point, but it can still start on fire using a blowtorch. If you are using just a bit of oil in a non-stick pan then there's not much fuel to burn, however if it flames it will probably go quick and the flames will go pretty high. It's unlikely to start your kitchen on fire, but you could get a nasty burn. Also, if you are using non-stick pans and you miss with the torch you could damage the coating. 

If you are using lots of oil then the risks of starting a serious fire are higher, if it flames you could get burning oil spattering all over the place. Probably not worth the risks.