Quote:
Originally Posted by HeadlessChicken
I've always put a few drops of silly oil in my propane, never caused any issue for my KWA MP7...I had pre-ordered mine and I'm not sure if there were any design revisions since. But I've heard about the swelling hopup though I've never had that issue as after each game I tend to clean out my whole gun.
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I dont add oil to my gas as often as it is suggested for. Usually once every 25 fill or so.
I did encounter hopup swelling, three times on three different guns, it's not matter of propane+oil vs green gas it's both. If there's excessive oil (both are usually used in excess, it will swell after 5k)