''I'd have thought you'd use JP-5 in that, Dan. Did the pictures come out OK?''
Ha ha. Fournier RF4 - but I'm sure you knew that. But one CFI checking my logbook in the States for a BFR didn't. He saw an entry which said Denver to Boston, RF4, 30 minutes! He was very impressed. I didn't let on that it was the original Denver, (Norfolk, UK) to the original Boston (Lincolnshire, UK) a distance of about 20nm - easily attainanble in a motor glider!
I was around when the first trials of MOGAS were being done in the UK in the eighties. It was always envisaged that the two would be mixed.