[TR] 'O' ring material

[Dave1massey at cs.com]

According to McMaster Carr:

http://www.mcmaster.com/#about-o-ring-materials/=mnd19n

Viton is Excellent for gasoline but poor for alcohol so with more and more 
ethanol being added to the fuel this may not be a good choice.  Neoprene is 
only fair with gasoline but good with alcohol.  Polyurethane is good with 
both but rates poor for compression set.  It looks like flurosilicone is the 
best choice.  If you can find any.

Dave

In a message dated 5/7/2013 11:01:25 AM Central Daylight Time, 
fogbro1 at comcast.net writes: 
> What is the recommended for 'O' rings exposed to fuels with ethanol 
> content?