I have heard any gasoline with ethanol is a bad idea for cars that do not get driven regularly. Ethanol has an affinity for water, which condenses in the tank and lines and rusts them out. I have heard accounts of fuel filters totally clogged with rust. I first read about this problem in regard to boats, which tend to sit long periods between use.
So, what brands of gasoline (if any) don't use ethanol? Are stainless steel gas tanks made for mopars at a decent price? Have any of you guys encountered this problem, and what can you do about it?

Gasoline that has or may have ethanol in it must be labeled on the pump that it contains it. I've seen pumps that say there is no alcohol in the fuel. In my area, all gasoline has ethanol in it. Getting far enough away from the city, I've seen pumps that say they don't have it. I don't know how it is in your area, but you may be in the same boat, that all gas in your area is gasahol.
I bought a car last year that I had nothing but problems with the fuel system. The 40 year old tank looked great from the outside, but was full of rust inside. From what I can tell, this car spent most of its time in storage and wasn't driven much. I don't know if it was stored with a full tank or any stabilizer added to the fuel.
I had to replace the tank and lines.
I have another 40 year old car that I've had 14 years, and in a typical season drive 3-500 miles a year. It is stored 6 months a year. I top the tank and add stabil prior to its winter hibernation, so far no problems with rust in the tank (knock wood!). Again, there is no gas anywhere around here that does not contain alcohol and in 14 years I have not had a problem.
My advice would be to top your tank off if you are going to not drive the car for a couple months, and if it is going to sit more than 3 months add stabil or seafoam to the tank.

I too put Sta-Bil in the new Challenger because it sets a lot. I use it in the 69 Coronet daiy driver also to fight corosion from the subsidized ethanol that we are forced to use here.

I haul gas. On humid days I have been cautioned against leaving the under ground tank inlet open too long. The alcohol will suck the moisture out of the air. If it gets too much moisture in it? It will create a layer of water, and alcohol towards the bottom. Gas on top. Alcohol is heavier than gas. That gas is usually 84 octane before adding the booze.

Ethanol will rot your rubber fuel lines from the inside out. Buy fuel injection line from the parts store, and buy the FI clamps too.

I would shy away from any plastic filters. The ethanol discolors our sight glasses on our loading heads. It cracks them. It shrinks the rubber seals in our hoses.

Weird thing is my '79 Maxivan wasn't started for 1 1/2 years. E-10 in the plastic tank. It ran fine. I have driven it for over a month. The carb wasn't touched. It is a Mopar Quadrajet. No additives to the tank.

Some areas you can buy "rec" gas. Recreational gas for boats that is alcohol free.

My Husquavarna riding mower owners manual says not to store it with E-10 in the tank over the winter.

When working at Lowes people had lots of issues with the fuel lines in their string trimmers.

I am no authority. Just relating my personal experiences.

I have changed tanks in both cars and run Stabil in everything gas powered. The stock 69 GTX has a little problem with the E10 evaporating when you stop it hot. The other 1963 car has an electric fuel pump but had the rubber hoses around the pump crack prematurely.
This site was on another thread this week. There are more stations around me than I realized.

http://pure-gas.org/

I personally had bad luck with stabil I use startron . we did a test put fuel in a 5 cups with all the leading drygas or additives let them set on the shelf for one week startron had the least amount of water in it and stayed and smelled like gas all the others where yellow and had water in them in 4 days .we store our harleys our formular 38 foot go fast boat and sleds with startron .I run all my toys almost to mty then a dose of 50/50 gas and startron problem solved .when I store them .I put one bottle in a gallon of gas no more fuel problems .

What about Heat? Its supposed to remove water in winter so your gas lines don't freeze. Why not use it for this purpose too.

If your in CA I can't believe that you can get non-e10 anywhere. Now Mr.President wants to mandate e-15.

Here in Wisconsin (home of the Superbowl Champion Green Bay Packers.) you can get non-ethanol if your at least about 50 miles from Milwaukee. By that I mean its legal to sell, but most filling stations still have e-10 because that's what the refiners are making, and its easier to get. Usually only the 92 Octane Premium is Non-ethanol. (again only away from Milwaukee)

I always use Stabil to store the car for winter but most times I put Heat in at fill up even in the summer.

Thanks for the suggestion Rug, I did upgrade the fueline, previous owner was using regular hose.

e-10 breaks down quick ie returns to organics materal green sludge in your gas tank and fuel bowl eats the rubber end off float valve i spent all last summer rebuilding carbs of our 4wheelers lawnmowers and we stopped useing in our cars 100% gas is the way to go

Justice Brothers Ethanol Fuel Conditioner helps prevent phase separation, corrosion and oxidation that is common to ethanol/gasoline blended fuel use...

All I can add is E10 has been avail here since the early 80's and causes vapor lock/stalling on carbed engines whose manifolds run at or above a certain temp what ever that point is. It did wreak havoc with early neoprene lines and carb internals but now replacement stuff (lines/carb kits) that's been std for decades is pretty much alcohol resistant. It does absorb minute amts of water so it is burned rather than settling on the bottom of the tank or bowl which is a good thing. It's a dime cheaper here and reportedly gets less MPG. I dont think it is causing steel to rust but it will clean out a tank/lines of what is already there but it deteriorates quickly as in a lawnmower would not start and the gas in the bowl looked like tea and that was from sitting over 1 winter. Alcohol does have a much lower BTU content than gasoline. Just thinking out loud