What gas milage do you guys get for 03 4.6is?

[E55AMG2]

17mpg highway and 12 city...and that's being generous. Mixed is between 13.5 and 14.

[andy_mhc]

i have a 4.8 and only had it a week but ive averaged 19.9mpg, although it is a bit of me and mostly my other half driving it.

[wullaby]

my 2003 4.4i i get about 15.2mpg all city driving, my wife drives it 5 out of 7 days a week, i know she gets on it cuz i see coffee stains in the cupholder!

[E55AMG2]

Originally Posted by GOFAST GUY

For whatever reason I haven't convert to L/100kms yet but i get
20-22mpg with summer tires on the highway and 17-18mpg with my winter tires on the highway

You must be doing 55mph

[dskyers]

i get in my 02 4.4i 11.0 mpg lol city miles... and thats up from the 10.4 witch was my norm

[Buckeyeauto]

15.2 mpg 50/50 city/Highway - 03 4.6is

[duboy]

our last tank was 75/25% hwy/local and we got 15.5mpg. That's actually more local than normal so i'm curious to see how this tank will turn out, i don't expect more than 17mpg for 85/15% hwy/local

[c4racer]

I'm right around 15mpg total average over close to 2 years and 20K miles.

Highway I get 17-19 depending on speed, hills, weather, etc.

Lately my wife has been driving it mostly around town with some highway - probably about a 50/50 mix. Speed average is in the mid 20's and mpg is around 14.

So true city driving would be 12-13.

It's about what you would expect. And probably within 1mpg of a 4.4i for that matter.

[GOFAST GUY]

Originally Posted by E55AMG2

You must be doing 55mph

I just got back from Vegas with it and with my much heavier winter tires on and averaging between 150-160kms/hr, I was consistently 16mpg. It takes a lot for me to dip below that with my summer tires but I am looking for lighter wheels to help with mileage and rotational mass.

[GOFAST GUY]

Originally Posted by chilliwilli

It's gone to hell via performance tune...

I'm interested, what have you done to yours that you've seen a huge difference in fuel mileage?