Don’t know Mike. Can’t find it, sorry.
But I did find this on the Viva website:
© Aviation Gasolines:
(i) Avgas 100 or Avgas 100LL: the latest version of either DEF STAN 91-90, ASTM D 910 or CAN CGSB 3.25.
(ii) Avgas 82UL: the latest version of ASTM D 6227
The reference (ii) interests me. I wonder if 82UL is being supplied to NT ? My sense is this would be higher in aromatics, like Mogas, and without lead, but I don’t know what the possible effects might be.
I also read a research report that compared two 0-320 engines running in identical circumstances for 150 hours, one on Mogas and one on Avgas, without detectable differences in VSR. Would have been more impressive if they had both run to TBO?
.
Kaz