Well I can tune the enigine to be crisp and clean and engine temps all ok but the power ouput is so low that there is really no point using the car, As soon as I lean a bit more to get performance engine temps rise, The manufacturer states engine needs fuel of 18% oil content regardless of nitro content but obviously the higher the nitro content the lesser lean condition is needed so lower temps. The fuel I have has 10% nito and just say oils on bottle so no idea of oil content.

It does look like I will be looking into mixing a fuel myself as Sport_Pilot mentioned because nitro is not available, but these engines are tetchy even with the right fuel so not sure but worth a try.