essentially, I get 15 mpg (16 mpg if I cruise at 65 mph for the whole tank) in my 2000 w/33's, 62,000 miles. This sucks because I got 18 all the time, and better highway, until about 4 months ago.
symptoms aside from horrible mileage:
-Black soot on tail pipe (and creeps back about 5 mm onto...