Gas Mixes for sheetmetal- 82/18 vs 75/25

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I asked this question elsewhere(  ) and got a slightly positive response. I'm wondering if anyone here has any input for me. I was at my welding supplier a few days ago for some wire. Anyway it seemed like a slow day there and I was talking to the counterman for awhile. We got to talking about what I do and the conversation turned to gases. I do alot of autobody sheetmetal work. While I don't have it in my sig line, I bought a used Lincoln MIG-PAK 10 (110 volt) to use for bodywork. The Lincoln works fine and is most portable for this need. Since I have a machine dedicated to thin stuff the counter guy said I may want to try an 82/18 gas mix. He claimed a few of his body shop accounts used it and it was the ticket for what I'm doing. I have (2) 80 CF 75/25 cylinders, one for each machine, so I can easily exchange one (when empty) for 82/18 and not be out anything, other than a tank of gas if I don't like it. He also said some people use 90/8/2 for everything but said I had no need for it as my puposes were better served with a cylinder of 75/25 for the Miller and 82/18 for the little Lincoln. It seems to make sense but wanted some other opinions.All input and thoughts on this subject are appreciated!MillerMatic 175Thermal Dynamics Drag-Gun PlasmaAirco Bumblebee AC/DC SMAWVictor Super-Range II oxy/act
Reply:have you worked with the 75/25 any?StangnetShop Full Of Stuff. Joey
Reply:Originally posted by vipermanz have you worked with the 75/25 any?
Reply:My local shop pitched 75/25 to me too and I bit, switching from straight CO2.  It is a little hotter with less slightly less porosity and spatter but not so much that I couldn't have continued to live with plain CO2.  I have not tried 82/18 but it should be somewhere between straight and 75/25.Get it hot and hit it hard...
Reply:if you are doing very thin stuff then the higher argon content will be to your advantage
Reply:Actually, C25 is cooler than CO2....