Have HVAC Questions? Ask an HVAC Expert for Answers
My name is Billy.
Oil does not have the flash point that gasoline or other flammables have.
I have cut many with a sawzall without issue. You can get a little smoke...but thats about it.
Fuel oil is not as flammable unless it is vaporized like a nozzle in the furnace.
Some old school burners slowly dripped oil into a pan that was burning..
Short story = just get as much oil out as you can...and that is mainly just to keep the smoke down.