Been fighting with my Millermatic 185....

I believe you'd have to have the valve changed to a CO2 valve. If you are interested, I'd just look for a CO2 bottle and keep the mix "for when you need it"

My take is that the mix is less spatter, and probably works better on lighter stuff.

Much of the time, my Lincoln 180 is "maxed out" on 1/4 or thicker stuff.

However, I've even done some exhaust work with mine on CO2