MikeFive,
In multiple different forums, we have covered the scope of the years’ long material compatibility testing completed for G100UL Avgas.
One of the early PAFI managers for their material compatibility program saw a 2013 presentation I did for the CRC group (affiliate of ASTM) and in the Q & A session stated it was a really good way to do that and asked if I would share the drawings and plans for the material compatibility test rig that the FAA had then already approved and which had been running for six months or more, at that time.
We agreed and did provide those drawings and plans to the PAFI program.
In addition, there were three other outside and independent entities that did substantial portions of additional material compatibility testing.
Our Cirrus, a TN SR22 (N223TN) first had G100UL Avgas placed in RH wing tank on January 27, 2010. 140 years ago. It has had G100UL in one or the other of the fuel tanks for most of the subsequent time. 18 months ago, the RH tank was topped off with G100UL and it has had G100UL in it continuously for the last year and a half.
In July, I flew it to Airventure and back.
It has never had any leaks and it has gone through 13 or 14 annuals and there has never been any reason to change out any fuel line nor any seals or O-rings.
Not sure what more we could do to resolve the pervasive doubts in the pilot community.