Quote Originally Posted by Aimstraight View Post

I am convinced that the Umerex bulbs also contain a lubricant but have never seen it mentioned when on sale.
I was told the crosman bulbs contain lubricant, the umarex bulbs that have the lube in are the ones labled maintenance, usually sold in boxes of 5.
But thinking about this, the co2 is liquid due to the pressure it's under, can oil mix with this liquid? If it can then when the co2 bulb is pearced the liquid vaporises, co2 boils at a stupidly low temp so as the pressure drops liquid co2 becomes a gas that propels the pellet, the thing is oil vaporises at a much higher temp (well over 200 C) so when the co2 becomes a gas the oil will be left behind, won't it?