This is not true. It's probably a mix-up with the small CO2 tanks for pellet guns and such. Those can have oil in them.
CO2 Refills in NJ
- Thread starter D2T
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Seems rather unlikely that anyone would source CO2 known to be contaminated with anything never mind actual oil unless it was destined for machine application...like airsoft guns I guess...
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Cheers!
Oil in the CO2 would screw up a weld pretty bad.
Assuming it didn't catch the user on fire first 
I'd have to look at my MIG manual to see if there's a metal that prefers straight CO2. I run a 75/25 Argon/CO2 mix for the mild steel work that amounts to 90% of my avocational welding, and straight Argon for the aluminum stuff that's most of the rest. It'd be unforgivable to contaminate any welding gas with oil - think of all the user tanks and gear that'd be effed up. Sheesh...
I'd have to look at my MIG manual to see if there's a metal that prefers straight CO2. I run a 75/25 Argon/CO2 mix for the mild steel work that amounts to 90% of my avocational welding, and straight Argon for the aluminum stuff that's most of the rest. It'd be unforgivable to contaminate any welding gas with oil - think of all the user tanks and gear that'd be effed up. Sheesh...
I don’t think there’s any metal that prefers 100% CO2, it’s hotter and spatters more than Argon CO2 mix but it works in a pinch
I don't think anything works better on pure CO2. I've MIG'd with it when it's all I had other than flux core. It's better than fluxcore.
lol! Faint praise indeed
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Cheers!
Yeah, more splatter but it does facilitate welding a bit thicker material.
