Car 1:
2002 Honda S2000
46K
bone stock
25mpg (5/7 days in rush hour traffic/city)
93 octane
Car 2:
1999 Nissan Sentra
125k
bone stock
27mpg
87 octane
Car 1:
2004 Dodge Stratus R/T
67k
Stock 3.0L V6 5spd
26mpg mixed driving
87 octane
Car 2:
1998 Jeep Grand Cherokee
133k
5.2L V8 Auto
3" lift, 32" Mud Terrains, Flowmaster Super 40 muffler
10-12mpg
87 octane
Car 3:
2007 VW Jetta
15k
Stock 2.5L I5 Auto
28ish mpg last I checked (wife’s car)
87 octane
02 wrx
turbo back & catless up pipe
cobb 93 octane stage 2.
RA gearbox.
22-26mpg.
97 impreza
stock 2.2 5 speed
bike roof rack.
25-28 mpg.
01 Focus zx3
stock to the gills.
28-30 mpg.
DD
GT 26" terra
1" slicks
50 mpt
(miles per taco).
95 Camaro 13 city
96 Tahoe 11 city/19 hwy
2001 toyota celica
26 around town/ 34 on the thruway
the best i ever got on the thruway was 35.
1992 Sundance - 2.2 n/a 90hp 5spd - 26/31
1999 Pontiac Trans Am - 5.7 heads/cam/DanaS60/Spec 4 /13lb Flywheel/Nitrous - 18-19 city and 31 highway.
2002 vw gti
1.8t hand of god
all the bolt on’s
27mpg- city
31mpg- hwy
99 Impreza 2.5rs
171k
Stock
24-28mpg.
87 rez octane.
Unless I use my ac. 
95 audi a90 v6
197K
K&N cone filter.
20-25 mpg city 30-35mpg highway
i go back and forth to rochester a lot takes me 1/4 tank for the entire trip 
1995 BMW M3
23 Mixed
28 Highway
2001 BMW 330ci
28mpg/21mpg
Supercharged/headers/exhaust
2005 Range Rover HSE
17mpg/14mpg
No mods
2007 Campanga T-Rex
35mpg/26mpg
Chipped and Exhaust
Car 1:
1995 civic
226k on the motor and body
bone stock less fart can and no filter
~37-45mpg (mixed driving) 2people in the car all times
87 octane
Car2:
2006 dodge caravan
89k
stock
25-30ish (mixed)
87
if you use better octane could you get better mph?
'93 SHO
216K
Stock 3.2 with manual trans swap
average 27mpg around town , 32mpg highway @ 75mph
87 oct.
'93 Mustang
45k on engine
Heads/cam/intake/exhaust/T5/3.73’s
average 17 around town always, 24mpg highway @ 70mph
93 oct.
I’m really amazed at how little fuel economy has really changed in the past 15 years…there shold be no reason why my high mileage, 1980’s designed SHO can pull equivalent numbers to todays cars.
Car 1:
03 Saab 9-3
80k
Stock
25-30mpg (89oct)
Car 2:
79 Z28
47 miles on rebuilt 400 small block
modified
10-15 mpg(93oct) Pending how i drive…
Sure there is. Power output is a function of fuel burned. Unless they somehow found a way to extract more heat energy per gallon of gas, it always will be. In this case, manufacturers chose to double/triple the amount of power and hold MPG constant. They likely could have gone the other way if we had continued down the (gay) path of the 80’s, and if today’s cars didnt have an extra thousand pounds of safety features.
Not to mention, many brand new cars are detuned from the factory. I just talked to Gary Burch about this last night.
Stock turbocharged cars for example, often run pig rich straight out of the box.
In some instances, yes, power has been drastically increased and mpg has remained similar. Exampl: C4 Vette of the mid '80s vs. C6 Z06 today
However, my point was more directed to standard everyday vehicles like my SHO. Todays cars aren’t that far ahead in the mpg category, despite advances in technology. I’m just surprised that some of the high tech engines out there don’t deliver a little bit better.
Lauren Fixx is on am 930 right now talking aboot mileage, etc.
02 A4 1.8TQM 5 speed.
Bone Stock
89-93 oct - no noticable diff. in mileage or performance.
95% city driving.
21 mpg driving it “hard”
26 mpg driving it smart (coasting whenever possible, keeping it out of boost)
27-29 mpg hwy. Could use a 6th gear to get better, but that wasnt offered until later models.