Fuel Question

I checked with local A&Ps they do not recommend using fuel with ethanol if the plane will be sitting for any length of time with the fuel.  

My opinion is if it sits or not the ethanol isn't good for anything rubber, if it's rated or not.

Our engines are rated for use with 100ll... 

Agree I do not use at all and if 91 Mogas without ethanol is not available I use 100 LL or mix in 89 with 20% 100 LL 

There's a lot of mis-information about ethanol fuels. I'm a retired Firefighter / HazMat tech with a chemistry back round.

Most in the US use ethanol fuel and planes do sit for quite a while and have no ill affects. I have friends with 2000 - 4000 hrs. on their engines with ethanol fuel. If your hoses and the like weren't rated for it then all our cars would be stranded on the side of the road. A lot of the world uses ethanol fuels now days. Down in parts of South America they use up to 23%. The bigger issue is the fuel tank. What is it made of. Many fuel tanks now days are coated. i.e. Flight Design coats their tanks and so do others. Ethanol in these tanks have not been an issue since they started in around 2003 and on. Some older style tanks that were just fiberglass and no coatings did have issues. Just check with your MFG.

You just have to use some common sense and check your system. 

Don't you think the fuel injection hose is much better at handling the ethinal than barricade carb hose?

I'm assuming that is one of the reason I have to change hoses on the plane every 5 years and my 20 year old vehicle still has same fuel hose