EFF150

16 mpg avg with 4500 miles on the truck

NGM

8.8 with 3.55 gears. Before the tuner the best was 20.5. I do not have a good example since the exhaust and cai. I went to Atlanta but alot of the time up there was either in traffic or in excess of the speed limit by alot. and still got 18.5. I was not upset at that.

onall4x4

my 2008 supercrew 4x4 isnt broken in yet.but right now i,m getting 13.5-16.8 miles per gallon.thats at -15 to 20c .here in manitoba canada if i buy at esso or petro canada i get better mileage.if i buy at shell or domo im pump to pump.the other day i drove 77 miles inwich 20 were city[at 35mph] and 57 hwy[at 62 mph] it took 6gallons of gas that was domo gas.cheap gas isnt allways a deal.at least here.

crv8505

NGM...

Did your Mileage improve after the dual exaust was installed?

How Much?

NGM

I havent been able to keep my foot out of it long enough to tell.. LOL I love the way it sounds.. I did the trip to Atlanta and with driving in atlanta and cruising at 100 mph for long periods of time I made 18.5. I am going to take a trip the weekend of the 19th I will try to be good and get a good mileage report.

Maggadore

My 2000 4.6 only avg 16.6 mpg (most highway miles)

It was a little over 17 before i got new rims and wheels

kodybyron

i run 36x14.50 on 20's w/ 8 inch lift and get 13mpg i was surprised!

AK911Carrera

Well gentleman, I just got 16mpg with my Supercharged HD. It made my day.

JohnC

I average 16.4 - 16.8 around town in my 08 5.4 SC 4x4. I really haven't tested it on the highway yet. But at .35 - .40 cents a gallon cheaper than the two 6.0's I have I am happy. With the cost of diesel being that much higher and the diesel option being 6-7K higher unless you need massive towing/hauling the gasser is the way to go IMHO.

Motoxd3

my 06 5.4 v8, bout 16000 miles

being nice and easy on the gas out of stops (REALLY RARE) bout 15sh?
Freeway bout 18-20 depending.
but...around town..now..being a stupid 18 year old... bout 11-14... ><
my wallet hurts lol