4.10s and an A4

alright i can get some 4.10 intalled and everything for like 250 which is really cheap...but i drive like 25 miles to work every day...what would i tach and what kind of gas mileage do you get with 4.10s and an A4

Rpm's will be 2500-3000 on the highway.
I daily drive my A4 with 4.10's I get 8 to 11mpg's in town but I drive very aggressively with the hammer down all the time. On the highway driving conservatively I get low 20's.

I'd say unless you drive your car on long trips a lot do it.