Being that the 4 Star has a setting to cook with one pot and smoke with the other, can I use a pure flavor wood pellet on the side set to smoke while using a fuel-type pellet in the pot used for cooking?
Like BP said, they produce a lot of ash, especially at lower temps. Even the 100% Hickory pellets, which burn about as hot as oak, tend to produce more ash.
If I want a special flavor mix, I'll mix a 1 lb of the 100% flavor pellets with between 2 - 5 pounds of oak pellets (depending on flavor and how strong I want it). Then they seem to run & burn fine and I get the flavor I want.
Flavors I have done this with are:
Savory Herb
Jack Daniel
100% apple (when the apple cooking pellets were back ordered)
Mesquite (I don't use mesquite enough to justify buying 40 lbs)
They have all worked quite well mixed with 100% oak.