Gas mileage

[Farmer888]

I know theres lot's of posts on this and no no I'm not complaining about my mpgs.
With my 2003 1500 qc 4wd 5.7 I have got about 16 mpg at the best nice flat easy drive and worst in in the city 11 mpg. I mostly drive country roads 90km/h 55 miles per hour and average 15 typically. I'm actually quite happy with it as far as pickup trucks go. Wintertime mileage is slightly less typically. And i hand calculate usually but I actually find my overhead display is usually pretty close surprisingly, I do reset it every tank normally.

Just curious how everyone else does for mpg? And how much of a difference do yo guys find driving easy etc helps mileage? I know some of my buddies with older trucks are foot to the floor and brake sall the time and get about 10 mpg lol. I'll hammer down sometimes but usually a nice steady pace gets me there same time as them or within a few minutes.

 

[Karlsweg]

12.5 around town, 16 on highway if I keep it below 70. 2007 hemi 4x4

 

[PuffTheMagicDragon]

My 06 5.7 2wd usually sticks around 15 hand calculated. Overhead is usually reading 16ish.

I don’t floor it, but I’m also not one to take it slow either. Mostly back roads at 45-55mph.

 

[Casper]

12.9 city, 16-20 mpg speed dependent on freeway. A little better on
summer formulated fuel than winter.

 

[PCA4208]

I think the best city is somewhere in the 14-15 range. Doing some math showed me highway of around 17-18. Just got a new exhaust so i gotta remind myself not to romp on it just to hear it. Your numbers seem pretty average with every truck.

 

[turkeybird56]

13-19 in City. On Hwy, 18-22, PROVIDED stay unda 70 mph.

Above dat, gas gauge acts like my old 396 Big Block gas pig, just saying

 

[Johnsram]

04 quad 2500 hemi: I've averaged 13mpg, 65% city, hauling 10% of the time.

 

[Ghostman]

About 11.5 mpg here mostly city,
08 Ram 2500 4x4 5.7, currently all stock w/240K. I've only had about 6 months. A lot of work to do with it.

 

[HemiLonestar]

I stopped keeping track after 2800 stall + 4.56's lol

 

[Farmer888]

I stopped keeping track after 2800 stall + 4.56's lol

Haha, You don't want to know. But really who cares I bet she moves pretty good! What all have you done to yours? I just have a CAI, slightly modded exhaust from last owner but it's in need of replacement really bad.

 

[HemiLonestar]

Haha, You don't want to know. But really who cares I bet she moves pretty good! What all have you done to yours? I just have a CAI, slightly modded exhaust from last owner but it's in need of replacement really bad.

Oh I know, I started to, then it depressed me lol. She gets along pretty well. I have done so many things to this truck, but driveline wise has a Superchips tune, intake fed from the scoop, torque management has been disabled, 2800 Circle D TC, Borla catback and SRT Dana 60 (which required a custom driveshaft)

 

[finally03gt]

2003 1500 5.7 quad cab 4x4. I'm houston area, so a good bit of city with 10 mile or some highway intervals. My driving habits: usually shifts around 3000, occassional flooring it, 75 mph on hwy. I usually see low 12's all combined. Seen low 11 if I have more city and high 12 with more hwy. Never averaged a tank over 13. I've notice a significant (0.5-1 mpg) difference on the hwy between 1900 rpm (about 71 mph) and 78 mph. I did this resetting the over head and watching for 5 miles. Never seen over 16 hwy. Oh, and pulling the travel trailer (which the truck sometimes struggles to keep at 60), I do a happy dance if I see 8 mpg.

MPG is my biggest complaint with the truck.

 

[Karlsweg]

2003 1500 5.7 quad cab 4x4. I'm houston area, so a good bit of city with 10 mile or some highway intervals. My driving habits: usually shifts around 3000, occassional flooring it, 75 mph on hwy. I usually see low 12's all combined. Seen low 11 if I have more city and high 12 with more hwy. Never averaged a tank over 13. I've notice a significant (0.5-1 mpg) difference on the hwy between 1900 rpm (about 71 mph) and 78 mph. I did this resetting the over head and watching for 5 miles. Never seen over 16 hwy. Oh, and pulling the travel trailer (which the truck sometimes struggles to keep at 60), I do a happy dance if I see 8 mpg.

MPG is my biggest complaint with the truck.

WOW!!!! Horrible mpg. Is it all tuned up and has it always been that bad?

 

[Michael]

I’m getting low 14’s driving around town. I carry about 800-1000 lbs of tools and equipment in my 1500 at all times. I’m also running 295/65/20’s on it. It’s hand calculated and I figure I’m doing pretty good considering the weight my trucks carrying.

 

[drprymer]

14 2wd 5.7 Ive been getting just over 19 my day usually consist of 50 miles on I-95. Hopefully once I get this lift off and normal tires ill be able to squeeze 20 out of it

 

[finally03gt]

WOW!!!! Horrible mpg. Is it all tuned up and has it always been that bad?

K&N filter is about it. Stock size tires and factory 3.92's. I've owned it for about a year and 20k miles. Been that way since I bought it.

 

[Karlsweg]

I would clean the throttle body and check the plugs. Have you ever reset the computer? I would look at the O2 sensors as well. They may not throw a code but they do have a “shelf life.” I changed mine and they were shot and weren’t throwing a code.

 

[finally03gt]

I would clean the throttle body and check the plugs. Have you ever reset the computer? I would look at the O2 sensors as well. They may not throw a code but they do have a “shelf life.” I changed mine and they were shot and weren’t throwing a code.

2 new O2's, and a new 3" cat after throwing PO420. Reset computer at that time. O2's look right..... T-body cleaned and new plugs when I got it. Also, all new fluids and a seafoam decarb. And occasional run Lucas fuel treatment.

 

[Karlsweg]

Did you reset the computer after changing everything?

 

[finally03gt]

Yes sir. But I'm really not far from the OP's numbers