[QUOTE=Robert Dochterman;12800851]Yes, 98 octane unleaded ethanol free at 32:1 Motorex oil from Sweden. Adrian said to try Amsoil Dominator.
Interesting about the prop. More pitch and diameter equals more load on the motor but at less rpm. Maybe the lower rpm is the solution? What brand prop?[/prope

Hi Robert. Interesting on the cooler temps on 90 degree orientation. Do you get the black thin exhaust residue with the Swedish oil mix? I run Amsoil Dominator (as recommended by Moki and UMS sellers here in the states.) It is certainly filthy, but if it reduces wear for longevity, I am ok cleaning it off after flights. Your take?