I just started tracking my mileage again, here's what I got recently.
16.7 mpg... mostly around town (all measurements using USA gallons)
24.25 mpg... all interstate 70+ on the way to a track day
11.56 mpg... after my track day
This was done by filling up the tank and dividing miles driven by gallons used, not using the OBC ( which is enabled but I don't have the stalk)
EPA for 2000 S is 16 city and 23 highway (18 combined) so I feel I am in line with that. I don't take it easy, I get to the speed limit quickly and safely
The reason I started checking again though is that I felt like I was having to fill up too often. Sometimes these cars can get finicky and only let you fill up to around 3/4 of a tank (or less) which could make it seem like you are always adding gas. Search for threads on this to see what other folks have encountered on this.
They are great cars! Welcome!
Steve
Edit: some links on the gas tank filling issue. I fill the tank slowly now (never at pump full speed) and when it clicks, I am done. If it really is full when it clicks, and you force more gas in, it will slosh out and down the side of the car... I have done it a few times and it is aggravating
Now I make sure to get the nozzle all the way in the tank, fill it nice and slow, and then when it clicks I am done. And you can usually hear it before it clicks by the sound.
http://986forum.com/forums/general-discussions/47433-problem-gas-station.html
http://986forum.com/forums/general-discussions/36031-gas-mileage-gone-bad.html
http://986forum.com/forums/general-discussions/35527-two-problems-qs-sticky-clutch-gas-tank-does-not-fill-full.html
http://986forum.com/forums/general-discussions/23296-gas-tank-problem.html