Old ScaleGuy
Check your area for a station that caters to hot rodders, or look up a local rod club, they may look rough
but most are really friendly,
My flying buddy and I go to our local privet airport and get 100 ave gas (no ethonal) it has little smell does not sour and will store over the winter just fine. for brake in's we use a good quality ashless 2 cycle oil for the first gal at 40:1 then switch to a quality synthentic.
hope this helps
Cheers bob T