Magnum DZ fuel
I have been using Magnum DZ fuel for both my 140 and 160 DZ for about 1-1/2 years now, and have had trouble with carbon forming at the valves. After about 40 flights, the engine will run slower and slower, and eventually, I had to send it to Verano for decarbonization.
According to Buzz at Magnum, he isolated the problem last year, and changed one of the addictives. The engine ran fine for a while, but started to develop the same symptoms again. Verano have just repaired a 160 for me and mentioned there were carbons on the valves again.
I understand you are also using the same fuel, hav eyou notice any problem?
Thanks in advnace,