Originally Posted by kalnaren
It is if you don't want your seals to dry out.
Green gas is propane with added lubricant. Propane has no oil in it, so you have to add it your self.
Does the propane affect the velocity compared to the green gas. what i mean to say is: does the velocity stay the same with propane or does it increase or lower. I would think it would stay the same but i might be wrong.