RE: Magnum DZ fuel
Adrian,
I run mine rich. Of course one would think that would make it worse, rather than better. But perhaps it keeps the engine running cooler. Don't know. I took my engine out a couple weeks ago. It had been in the plane since last June. I probably had about 20 gallons through it (180 flights). I did notice a few good size pieces of carbon in the header cap (Central Hobbies) but after chipping away some they came out and I was able to put the chuck in and take the header off. Did not notice any carbon build up inside the combustion chamber, nor any real power loss (or power difference when I put my fresh 160 in).
Don