I am at about 20,500 miles... and yes, it was topped off the day before it started to become sluggish. I filled it the next day, no top off, and after 1/2 tank gone, it started acting up. Filled it up again since, did the reset of the fuel injection (WOT with key on), changed the air filter (first time) and it seems to be running fine. Taking a 150 mile trip today. We'll see what happens. No news is good news.