With the 2032R I would not be concerned about fuel consumption. You could waste fuel or try to conserve fuel while doing the same tasks for a days work and could not buy a candy bar for the savings difference imo. Five gallons of fuel can get a lot of work done. I would avoid long idling times though, better to shut the tractor off.
Tasks such as mowing, tilling and snow blowing I prefer pto rated speeds. Box Blading, raking and loader work are at various speeds that feel appropriate to me. YRMV.
I guess I did use the words ( wasting fuel ) that really wasn't my point, I was really more concerned with damaging something on the tractor because traveling at 2500 RPM's just seamed like the engine was doing more work than it needed, kinda like putting your truck in first gear and putting the pedal to the metal and watching your RPM gauge max out and your going 5 miles per hour and your truck is begging you to shift. But you are right I did say wasting fuel.