Fiberglass also absorbs water and can loose strength due to that.
Regular gas also leaches out the unreacted resins, just much slower.
Even much slower is still not slow enough if you are going to give it
25 years to work on it. It is likely many of these tanks in question
are of dubious condition to start with. Fiberglass is not really the
best choice for a fuel tank.

Imho anyone with a fiberglass fuel tank 25 years old ought to be taking
a pretty critical look at it no matter what gas they are putting in it.

FWB wrote:
On Mon, 24 Jul 2006 20:23:24 -0000, Chuck Gould
wrote:

Thanks for mentioning that fiberglass fuel tank issue again. It's been
covered before but it can't be covered enough until everybody with a
FRP fuel tank knows *not* to put ethanol blended gasoline into it.

Here's some more on it:

http://www.boatus.com/seaworthy/fueltest.asp


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