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Home » Public Forums » GMCnet » Propane Fill, Moisture, Methyl Alcohol (Have things changed in 35 years?)
Propane Fill, Moisture, Methyl Alcohol [message #214576] Tue, 16 July 2013 08:03 Go to next message
mickey szilagyi is currently offline  mickey szilagyi   United States
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Registered: January 2013
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We are about to fill our propane tank for the first time since we bought the GMC. We removed the tank, stripped it, painted it and reinstalled it. The tank has some propane in it as we could feel and hear it sloshing around in it when handling it. We will also be checking all the lines and appliances (stove, oven and furnace) once we get some fresh propane in the tank. PO said furnace worked great.

The operation manual on pages 94 & 95 mentions adding methyl alcohol when having the tank filled to help get rid of any moisture in the tank and lines. We've called several RV places that fill tanks and they either haven't heard of such a thing or say they don't do it.

Is this something we don't have to worry about? Are there additives in the propane now-a-days that do this automatically? Is the propane today better than what it was 35 years ago? This is our first experience with propane.

Thanks to everyone, you always have the answers!


Mickey 1977 Kingsley, 403, Lansing, MI
Re: Propane Fill, Moisture, Methyl Alcohol [message #214598 is a reply to message #214576] Tue, 16 July 2013 10:41 Go to previous message
JohnL455 is currently offline  JohnL455   United States
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Registered: October 2006
Location: Woodstock, IL
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Senior Member
Since the tank is not completely empty the vapor pressure of the propane keeps positive pressure in the tank. No additional moisture can enter as I see it. Don't know if the liquid has a service life time. Chemists may chime in but since it is more a "all one type molecule" situation than the more complex gasoline with lighter and heavier components, I would think it to be stable. I would think simply using it would solve any problems by dilution of old with new and replacement.

John Lebetski
Woodstock, IL
77 Eleganza II
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