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MPG?

6K views 123 replies 17 participants last post by  Knooper3 
#1 ·
What MPG do you get with your 4.0? And what improved it?

Mine went as low as 10 last winter but around 16 in general. Nothing (tuner, CAI, exhaust, headers, throttle body spacer) improved it yet as far as i can see.
 
#4 ·
do you stay on one tune or switch it up a lot? also do you manually calculate your mileage or go by the cars computer mileage? lol I stay on my 93 octane hybrid tune for the most part. I would think changing tunes & octanes a lot might screw with the system
 
#5 ·
no, i kept my 91 octane tune since april:) but my battery goes dead often and that might be similar. i would go 93 too but in Europe (where i'm from) gas is at least twice the price in the US so i don't bother. i use the car's mpg calculator but i think it should be quite accurate. by the way, is your city hilly?
 
#14 ·
I just purchased a 2009 V6. i also get about 11-13 in city. no hills. lots of stoplights. clean filter. 87 street tune by bama. and no other added mods as far as i know if.. frustrating because i should be getting much better. anybody have any advice?
 
#18 ·
I have a 2007 with close to 50,000 miles I have a ford racing cold air intake, headers, dual exhaust with x pipe, and for the most part I run the 87 octane street tune from Bama. My fuel mileage doesn't change when I change tunes it seems to stay about the same. If I am real froggy with it I get 16mpg . for the most part I average 19 mpg. On a road trip I get 21 almost 22 mpg and that's doing mostly 80 to 90 mph.
This may be a dumb question but have you changed tire sizes on your car and if so did you reprogram the speedometer for the different tire size? If you have a smart phone you can check your speed with your gps.
 
#19 ·
no new tires or anything either. cant figure out what the hell it is. but its beginning to irritate me very much.

---------- Post added at 09:49 PM ---------- Previous post was at 09:48 PM ----------

and might i add that i drive like a grandma also.. dont heavy foot or anything very often.
 
#22 ·
i've seen that at the automatic, it really helps to take your foot off the acceleration pedal and let it go by inertia instead of keeping the speed with the accel pedal. also at about 40mph mine gets the best mpg. i'm waiting for those retrofit hybrid kits to add, it really should be interesting:) other solution i can't find
 
#32 ·
Put sea foam in a vacuum line. But do very little. Pour slow. And if you do it right you will hear the engine struggle for a second the rev a lot higher. Keep pouring a little bit more in and the rev the car. If you see blsck smoke comming out of exaust pipe you did it right. It gets rids of all the carbon build up
 
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