On Nov 17, 9:42*pm, Darryl Ramm wrote:
On Nov 17, 9:36*pm, wrote:

On Nov 17, 5:48*pm, Mark wrote:

If you have a composite fuel tank and the fuel available in your area
has ethanol in it then you should google something like the
following...

ethanol fiberglass fuel tanks

We stopped runing mogas in our STC'ed pawnees when CA Dumped MTBE and
went to 10% ethanol a few years back, *Concern was more on the other
elements of the fuel system, I think the early Pawnee fuselage tank is
polyester.

aerodyne

I think you want to be concerned with Polyester resin based tanks.

Not a drop of mogas is ever going in my ASH-26E, for possible tank
problems with Ethanol and other reasons including engine cooling.

Darryl

Polyester resin based composites have been used for underground mogas
storage tanks (gas stations) for decades. Polyester and vinylester
are very chemical resistant.

aerodyne