Kinda a mix as far as how hard I drive it. Most of the time I go easy on her lots of coasting down from higher speed when I can and easy on the accelerator, and then there are those days where I find it necessary to squeal the tires at every stoplight. It's got 45000 miles on it.

 

'99 Z34 with a 3800. I have an air intake. I drive softly. 20 city and 28 highway. (Driving 70 mph) If I drive it hard I get about 15 city and 20 highway.

 

2006 Monte SS - 5.3L V8... just about 56,000 miles on it... drive 50/50 city/highway - 80 miles a day. getting 20.5 - 20.8mpg... and that's with no DOD... and I don't baby it either...

If I baby it, I've gotten 24mpg...

 

i have an 04 with wizaired intake, 3.4 in pulley, 3 in d/p highflow catand i drive city but with speeds up to about 58mphand not too hard but not grandma either and my homelink thing says an avg of 21.5/21.6 constantly more 21.5 though

 

3800 stock and im getting 17.4 mpg average using regular unleaded fuel.

 

'99 with the 3800
Air Intake
20 in the city and about 28-31 on the highway depending on how fast I drive

 

'02 SS
3800, no mods.
114,652 miles (at oil change Saturday)
usually 24-25 mpg mixed city/highway
Best I've gotten is 28, worst was 19 but I've only had itabout 6500miles (9 months).

 

05 LT 3400 no mods. Mostly highway and country roads. Drive it moderately. 27.2 mpg before replacing plugs, wires, and air filter. 29.7 mpg after.

 

04 s/c with 29xxx miles and i get an average of 22-23mpg i do a little highway drivin but where i live it doesnt matter. i live in the mountains of PA and have to travel down over them to get to work, and back up to go home, it kinda sucks but i have never saw flat land and think i would go kinda nuts if i did, haha