12.1 mpg avg. fuel mileage [Archive]

White Turbo

03-06-2008, 10:41 PM

slvr03dakrt

03-06-2008, 10:47 PM

i get around 13.5-14 according to a calculator.

Typer00_0371

03-06-2008, 10:51 PM

old r/t would get 13.5 city and 17.0 on highway

BTLFED R/T

03-06-2008, 11:08 PM

old r/t would get 13.5 city and 17.0 on highway

17.7 was the best I got. It seemed to get better with mods. :jester:

tcuillier

03-06-2008, 11:10 PM

Well since I just did new top rings,, I've been running around in town and on the freeway seating them.

Since I haven't raced it yet this year, I decided to re-set the overhead computer and see what the avg. economy was.
I've been gettin on it quite hard in town for short distances, then letting off, 4000-4500 rpm 1st and 2nd gear shifts, etc.

I was surprised to to see the economy at 12.1 mpg....
Not bad for the mods I have... 54 lb. injectors, DFI, turbo, etc.
Anyways,,, you guys with overhead computers, what are you gettin for avg. fuel economy out there??
Probly a lot better than me !!:jester:
Hi Ed,
I don't know if I would put a whole lot of stock in the overhead computer. Most I've had were off as much as 2 miles per gallon! Using the tried and true "divide the miles by the amount of gallons" method, I usually get about 12.5 city and 16 to 17 hiway.

Tom

mtlcafan79

03-06-2008, 11:49 PM

Especially with different injectors and DFI I'd throw those numbers out the window! I'm getting a calculated 11-12 mpg with my 408.

emwhiteR/T

03-07-2008, 12:09 AM

Hi Ed,
I don't know if I would put a whole lot of stock in the overhead computer. Most I've had were off as much as 2 miles per gallon! Using the tried and true "divide the miles by the amount of gallons" method, I usually get about 12.5 city and 16 to 17 hiway.

Tom

That's about what I get too! Usually 15 on the highway though.

bad360rt

03-07-2008, 12:29 AM

Last time I calculated it on the old setup I was getting 17.5 on the highway, not bad for the power I was making.

I think the new setup will be lucky to break double digits LOL Most mods also tend to help with mileage, but there's definitely a point where it starts going the other way, and I think I'll be well past that point :jester:

White Turbo

03-07-2008, 01:00 AM

Especially with different injectors and DFI I'd throw those numbers out the window! I'm getting a calculated 11-12 mpg with my 408.

Yeah,, I really don't take much stock in the computer... I just re-set it mainly for shitz & gigglez..
I was just kinda surprised since it's usually around 11 mpg with my mods.:jester:

6speedrt

03-07-2008, 07:05 AM

I usually get about 300 miles before the light comes on at 1/8th of a tank. With half city/hiway I ended up at about 16.8 or so calculated. It said 17.2 or so on the overhead if I remember right. Been a while since I drove it....

John

03-07-2008, 10:51 AM

When Im running only around town, Im usually getting 12-12.5 so even with all your mods you are doing good. On the highway it varies though. I get like 18 at 45-60 mph But 75 it drops to 15 and then just gets lower as I go faster.

99BarneyRT

03-07-2008, 12:41 PM

You guys all suck lol! I'm getting 9...on a GOOD DAY! Think its time to change injectors and go DFI Thruster. Running premium gas and overhead reading 8.8 - 9.2 mostly is why it sits IN the garage.

AtcoRT01

03-08-2008, 01:52 AM

I'm getting an average between 13-15 commuting to school every week

fastdodgert

03-10-2008, 01:38 PM

i get around 10.8 miles to the gallon goin around the city. and about 200 hundred miles to a tank of gas, no lie. once its finished and tuned, i should get alot better, the stock head on these motors are wayyyyy to restrictive

Magnum

03-10-2008, 01:49 PM

overhead says avg 12.6, It normally divides out to 13. Most of my driving is city/highway and since I drive it :burnout: like it is stolen...oh well

jsd512

03-18-2008, 12:48 AM

I average about 12.5 or 271 miles on close to a full tank.

packard1

08-16-2009, 08:42 PM

Not sure where everybody gets their #s but i know of 4 different r/t ,s and all i see is 8-9 around town and 12 hwy if you don,t throttle them.. figured all mileage by hand divide=truth. not glamer figures. had a friend who had one claimed 17 hwy sold to another friend, he got 12 hwy. i,ve heard all the blue sky #,s but never saw it.. a dealer by me sold a 2000 r/t and there trying to get 15 hwy out of it and can,t .. thinking of putting a fuel inj. chev-vette in mine......

bfranzel

08-16-2009, 08:52 PM

i average 13 on mine and thats mostly highway!!!

packard1

08-16-2009, 09:20 PM

a friend of mine says thats what he averages on his over head but when we went to a street rod show we split the fuel cost and both ways figured out to be 12.1 all easy hwy no stops 70 mph. around town he gets 8-9. with the economy and fuel going up it really hurts..

ADakotaRTGuy

08-16-2009, 09:20 PM

Overhead, hahahahaha. It says I am getting over 20 mpg, not even close I am sure. I have not really put a whole tank of gas through it but I highly doubt that cause I would get like 400 miles or something crazy like that.

01slvr59rt

08-16-2009, 09:24 PM

My average using the divide miles by gallons method brings me to 14.2-14.7 mpg. That's with a 5 day a week round trip of 48 miles per day, 4 of those miles are city driving to and from the freeway. I average 75-80 mph to and from work. My truck is all stock except for a K&N cold air setup.

G-Man

08-16-2009, 11:10 PM

I am getting between 14.5 and 15mpg. or about 220 miles on a tank
Gwyn

packard1

08-17-2009, 12:44 AM

ADakotaRTGuy

08-17-2009, 12:52 AM

You know are sounding like a real prick right? So he gets terrible gas mileage. So what? My Hat Off To -- 99barney R/t ,, Guess He Got An A In Math Class And Failed [bull Sheet] Thanks For The Honesty Barney..
These R/t,s Are The Best Looking Trucks-hot Rods Ever Built But Mileage Sucks... Thanks To The Honest Dudes Who Passed Math Class........

Killer_Mopar

08-17-2009, 01:42 AM

My Hat Off To -- 99barney R/t ,, Guess He Got An A In Math Class And Failed [bull Sheet] Thanks For The Honesty Barney..
These R/t,s Are The Best Looking Trucks-hot Rods Ever Built But Mileage Sucks... Thanks To The Honest Dudes Who Passed Math Class........

http://media.ebaumsworld.com/picture/DonDee500k/ENGLISH.png

Anyhow, I get around 12.2 MPG city according to overhead and when I divide it out. I see approximately 16 MPG on the highway at 60-65 MPH.

packard1

08-17-2009, 01:45 AM

HAY ASS LICKER , THE MORAL TO THE STORY IS THE R/T,S DON,T GET THE MILEAGE YOU CLAIM:finger:. BARNEY WAS HONEST.. : YOU EAT SHIT,,,
BESIDE THAT I SEE YOUR TRUCK IS A REAL DOG :jerkit:

ADakotaRTGuy

08-17-2009, 01:50 AM

Who are you even talking to? Amber gets about 12-14.

Killer_Mopar

08-17-2009, 02:02 AM

Who are you even talking to? Amber gets about 12-14.

Who cares who is talking to? he has the writing (and general) intelligence of an 8 year old.

wyotech_cuda440

08-17-2009, 02:08 AM

I dont have an overhead computer, I always do the math on mine. I get anwhere from 9 to 11 around town, driving very hard. On the occasional freeway trip I've seen 15, with a/c on and cc set at 78. This was with the truck bone stock other than superchips and replacement K&N filter. Just did K&N cold air, 52mm TB, M1, and SCT yesterday, it will be interesting to see where my mileage goes. I have a lead foot, and live 2.1 miles from work, so my mileage will probably drop, but I'm so close to work that it doesnt matter much:drive:

dakotabluert98

08-17-2009, 02:14 AM

honestly who cares what gas mileage we get, if we wanted a gas sipper we all would have bought a prius.

wyotech_cuda440

08-17-2009, 02:22 AM

FUCK Prius!!! LOL!!:jester:

dakotabluert98

08-17-2009, 02:27 AM

FUCK Prius!!! LOL!!:jester:

thats my point :jester: :biggthumpup:

wyotech_cuda440

08-17-2009, 02:35 AM

Check this out-http://www.thetorquereport.com/2007/03/toyotas_prius_is_less_efficien.html

wyotech_cuda440

08-17-2009, 02:43 AM

Found the original report- how do all the nature nazi's ignore this?:rtfm: http://www.pacinst.org/topics/integrity_of_science/case_studies/hummer_vs_prius.pdf

tcuillier

08-17-2009, 06:18 AM

honestly who cares what gas mileage we get, if we wanted a gas sipper we all would have bought a prius.

Amen on that! I have a Honda Si (2008) that I drive when I'm worried about mileage. It runs 14.8 - bone stock in the quarter and gets 25+ when I drive the crap out of it and 32.2 on the hiway. Buuuut, it's not near as much fun as the R/T!

Tom

Intense RT

08-17-2009, 07:17 PM

Best I ever noticed was when I drove from texas to nc. I needed to stop for gas at 380+ miles driving 65-70mph. It drops fast if I go 75. All in town, around 300 I think.

dansac

08-19-2009, 02:15 AM

honestly who cares what gas mileage we get, if we wanted a gas sipper we all would have bought a prius.

Or how about those "smart" aka DUMB cars! LOL, I passed one today and I wouldnt be caught dead driving that thing nor would I fit in it at 6'6" 340lbs I think I weigh more then that car weighs!

Anyway my 2000 r/t CC gets 17 hiway and 12 city, combined hwy/city is 15mpg if i am driving like grandma wich I usually do now a days since being unemployed.thats calculated and on the overhead computer that has allways been right on except the outside tempature on it allways reads like 20 degrees hotter then it really is.

dakotabluert98

08-19-2009, 12:40 PM

Amen on that! I have a Honda Si (2008) that I drive when I'm worried about mileage. It runs 14.8 - bone stock in the quarter and gets 25+ when I drive the crap out of it and 32.2 on the hiway. Buuuut, it's not near as much fun as the R/T!

Tom

you hit it right on the head "Buuuut, it's not near as much fun as the R/T!" these trucks are a blast to drive.