So, today or this weekend I plan on ordering a GBB pistol and a mag or two. I've got a few questions about the green gas.
How long will it last in a can, just sitting around? Can I buy a case and store it or will it slowly leak or dissipate?
How long will it last in a mag? As far as, does it last one mag dump or a few (18 shots per mag)?
How much does performance lag in the winter vs summer?
Propane... I've got a spare tank, is it okay to use propane? I've read mixed reports. I also read there is a pump you can use to add oil to it.
#1 As far as I know it has the same shelf life as cans of Propane. ( green gas is just propane with silicone oil added) #2 You should always keep a little gas in the mag to keep seals from drying out. I've had mags filled for over a month with no loss. #3 The cold will drastically lower the power of the gas, summer heat causes the the gas to expand and generally will bump the power a little bit. #4 Most players use propane, with a little bit of silicone oil added to help maintain the seals. #5 They now make the pump to add oil in to the propane, but honestly it's not needed. a couple drops in the magazine valve or a drop in the adapter before filling will be enough. Propane can be purchased for less than half the price of green gas, and usually is a larger can as well.
The guy who started Airsoft Innovations, the manufacturer of the adapter linked to above, wrote an article a long, long while ago in which he tested three types of green gas using mass spectrometry. Basically they all turned out to be propane with some minor additives.
Here's a link to the AI propane adapter that references the original article. Obviously, bear in mind that this comes from the manufacturer of a product designed to allow the use of straight propane as opposed to green gas.
That aside, the general consensus is that green gas is propane.
I've used the old Coleman portable propane tanks for years to fill up my GBB magazines. I usually put a drop or two of silicon oil into the adapter every time I switch cans. I've never had an issue.
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Last Edit: Dec 20, 2013 10:28:49 GMT -5 by Gimpalong
Silicon oil is used a lot in paintball guns; so you can usually find little bottles of it sold at Dunhams, Gander Mountain and other places that sell paintball equipment.
Of course, you can probably also buyer it in larger quantities and for cheaper at places like Lowes, Home Depot, etc in the lubricants aisle or wherever. You just want to make sure that you're actually getting silicon oil as stuff like WD40 will eat away at the seals or dry them out.