I am getting worse gas mileage than I expected

[Bradleys]

Still on my first tank of gas, but I am averaging a little over 13mpg... Trying to stay off the pedal, but this seems lower then I was expecting. 15 in the city was the advertised rate and I am nowhere near that.

Thoughts?

 

[Neurobit]

Still on my first tank of gas, but I am averaging a little over 13mpg... Trying to stay off the pedal, but this seems lower then I was expecting. 15 in the city was the advertised rate and I am nowhere near that.

Thoughts?

Do a search. Please.
There are multiple threads on this already.

 

[SD Rebel]

Still on my first tank of gas, but I am averaging a little over 13mpg... Trying to stay off the pedal, but this seems lower then I was expecting. 15 in the city was the advertised rate and I am nowhere near that.

Thoughts?

As mentioned there are many threads on this. But the 15 city / 22 highway is probably based on a truck with the 3.21 axle ratio and 18" wheels w/ street tires. If you have the 3.92 and the 22" wheels or the Rebel's 33" all-terrain tires, kiss any chance of that good bye! The issue is RAM blanket EPA rated all their trucks with those numbers, which can be quite inaccurate for a lot of trims.

I have the 3.92 rear axle and 33" tires with my Rebel and the best I was able to get on the highway was 17.5 mpg. I average 12-13 mpg around the city, about 14 mpg mixed.

However, I knew that going in with my truck's setup I wasn't going to get the mixed 18 mpg I got on my Ecoboost 2.7L which was about as fast as my Hemi, but got about 4 mpg more in just about all situations. However, I was willing to give that up for the sound & sense of occasion that comes with a Hemi engine.

 

[SilverSurfer15]

Yep, it will go up some after awhile, closer to 15 probably. Although this may sound stupid, you should never trust the numbers on the sticker for any vehicle. They are almost worthless. If you look up how they measure them, it’s a joke. The only way to get a decent idea is look at a forum or fuelly.

 

[cotonymopar]

I bought a truck... with a v8, 3.92, 22 inch rims. this is my 3rd hemi, 2nd with mds, and it is getting great numbers.. I suggest when you can, use the cruise...

 

[Biga]

Mine was low until I got about 7,000 miles. I was getting 14 but I'm up to 17-18 with mixed driving now at 12,000 miles. It is an etroque but etorque or not the numbers will come up with break in.

 

[Diamondback]

I'm getting 9 so far ..
and that is babying it a bit to break in the motor ..
of course, I only drive like 3 miles a day to/from work.

I did put roughly 30 miles a day last weekend to drive it and get used to it and get some miles under the hood.

 

[J-Cooz]

Take a few thousand miles to break in. It should improve a few MPG.

 

[TruckDriver]

for Rebel reference; I did a ~1700mi road trip alternating tanks of 89/91 and got ~17mpg. This was through 113* highways and a climb from a desert to 7000' overall as well.

Still on your first tank of gas? you've got a little while until the motors broken in and the ecu learns your habits... the best thing you can do is to drive as you do and let the ecu learn as well

Edit Update: 3.92 Gears, Duratrac 33's, eTorque Hemi (all stock), at about 10k ODO

 

[Willwork4truck]

Ahh, you didn't get the Prius trim version, darn dealer ordering system.

 

[TruckDriver]

Ahh, you didn't get the Prius trim version, darn dealer ordering system.

Oh yeah this model! I remember it being a limited time thing




(sorry, I had a few minutes, sorry to derail the mpg disco)

 

[Kicker]

Yeah, Still on my first tank, 13.7 mpg, got on the highway, took it up to 70, let off the gas and the quick mpg said 99 ! WooHoo! But the pesky main on was solid on 13.7.
Reminds me of high school and my Cuda', 14 was about it so I am not gonna cry, no sir. Love the Hemi and I will feed it!

 

[Ram19Va]

Almost 20 MPG with E-Torque off, and MDS off. 328 mile drive mostly Interstate.
Otherwise city with E-Torque off, and MDS off is around 18-18.6 MPG.
I'm now at 18,700 miles.

Always best to reset the Fuel Economy for an accurate measurement otherwise its including the idling, which kills MPG.

 

[SilverSurfer15]

You can’t turn off the Etorque?

 

[SpeedyV]

You can’t turn off the Etorque?

Exactly. (Must be confusing the start-stop function with the whole system.)

 

[Willwork4truck]

Oh yeah this model! I remember it being a limited time thing

View attachment 32365


(sorry, I had a few minutes, sorry to derail the mpg disco)

All the crap I hauled in the back of that Prius, from bags of dirt and mulch to lumber, you’d of thought it was exactly what you pictured.

 

[cipherbreak]

That’s better than my 11 combined—and I’ve been driving conservatively.

 

[Willwork4truck]

That’s better than my 11 combined—and I’ve been driving conservatively.

11 combined?

 

[cipherbreak]

11 combined?

Yep.

I’m glad I got the 33-gallon tank.

 

[Willwork4truck]

Something amiss there.
Have you taken it out for a 65 mph highway run for at least 50 miles? My son was getting 15 combined (with less than 1500 total miles then he went for an hour at 70-75 mph and got 20 mpg. Same Limited 3.21’s as mine.