Originally Posted by well biked
Good way to make a stinking, unneccessary mess-

And possibly burn down a house! Motor oil is a hydrocarbon and has a flash point...it's pretty high (around 450 F) but it can still be made to burn, especially if you are heating it directly on a burner. If you are going to heat it, use a double boiler so that the temperature is kept to around 200 F.