i own a 2000 rx300 and am about to break 100,000 miles in a few weeks. i put the highest grade gas in and i'll be the first to say i drive the *BLEEP* out of my car. on my worst days it goes to about 11.5 but usually just driving and then moderately overtaking people i get around 14-16 mpg in the city. but i never stomp on it off the line it is usually when i'm already at speed. it mostly depends on your driving habits really since somedays i can drive normally and baby it and get around 18MPG , and mine is AWD so it eats up a bit more than the FWD. the gas attendant once put in regular instead of super and i felt a pretty drastic difference in my car, idk about others but mine didn't pull at all. also on the highway i noticed that compared to my friends cars when we are in 5th doing anything over 65 we are above 3,000RPM so that also kills on gas. plus throw in the A/c and what not and it all adds up, but i can't complain, i love the car.