My first T-Maxx would run all day at 280, but it had great smoke, idled good, and never lean bogged. I got 6 gallons through that before I sold it, and I got it used. I wouldn't be surprised if it got close to 10 gallons before it decided to quit.

Running temps are a starting point, but not the only way to tune. So many other factors affect temps. Ambient temp, airflow, cooling head size, etc.

Also, don't make the mistake that a LOT of people do. NEVER tune an engine to temp with an oversized cooling head. The bigger head will drop temps 20-40 degrees or more, and some people think that it is then ok to lean it out. Too often, this results in running too lean.