telsonman

this is for the guys with 3.55s in. what is your average MPG??? i just got some put in and i'm getting like 18.

jeff

90mustang5.8

i have 3.55's but also have a moded out 351 so lets just say my MPG is much much lower

Nadelle

switching form 2.73 gears to 3.55 you will probably lose 3-4 mpg

nitrous_bob

i'll have to disagree , you should only lose about 2 at the most.

i have 4.10's and still get over 21 mpg , i used to get 23-24 w/ 2.73's

are you going by the corrected speedo ? and i'm also asuming this is mixed driving ?

if your only getting 18 w/ all miles on the freeway, something is wrong.

OnyxCobra

I dont bother calculating my gas mileage. I'd rather just have fun with the car and not think bout that shiat.

gr84u

Seriously if you have a 5.0, your obligated to deal with ****ty gas economy, if you have two like me, I am in the top 5 percentile in the world of polluters.

goathead75

I was all excited because my stang gets the best mileage out of anything I have at 21mpg.

Twisted

With 3.55s, I get about 17 in mixed (mostly city) driving, and about 25-26 on the highway. I think that's what I got with 2.73s though.

By the way, my city driving is mostly short trips, which is terrible for gas mileage.

2 kwik

no way..I'll tell ya in the city I gained a mile or 2 and haven't really seen much differeance on the highway

Nadelle

^^ thats good news, all things being the same i would presume that highway mileage would be down. Dont get me wrong im not saying you shouldnt go with the 3.55, That would be the gear ratio i would choose if it was my car.