New RAM 1500 Hemi 5.7 only getting 9-10 mpg!

[chloelight]

Hi you all. New RAM owner here. I own a 2019 RAM 1500 5.7 Hemi Laramie Sport. Recently I have been getting 9-10mpg on the highway and in the city. It is driving me crazy. I recently did a road trip (towing 4,000lbs) and that's when I noticed it changed. Even though I am not towing now the mpg has stayed the same. Before I towed I was only getting 12 mpg. I have the 21-gallon fuel tank and have to fill it up every 2.5 hours! So, I would love your opinions- should I add an additional tank? How can I fix this issue? Or should I just get a different truck or model and trade this one in?

 

[yankeefan31569]

i run mid-grade citgo or mobil gettn 15-16 city 20-22 highway, somethings not right with ur Hemi..

 

[Slumlord]

Do you have your display set to show you real time MPG or average MPG? Those numbers can differ greatly.

 

[ColoradoCub]

If you haven’t reset your fuel economy average on the screen it’s going to stay low after a trip towing and getting low fuel economy. Have you reset it since you got back?

 

[Stevenc150]

If it's a brand new truck, mpg will get better as the engine breaks-in...thru 10,000 & more in my exp. Also an oil change ~2K to full syn will give a slight bump (I do this in case there's any metal particles from break-in of new engine in the oil). Next oil change (~10k) can give another little bump. (Admittedly I "over-change" mine because whats the harm and its easy)

Main thing is u have a ~400hp/torque hemi...enjoy it instead of sweating the mpg. It's a V8 truck dont expect V6 mpg and dont believe every mpg someone says they're getting. Just my $0.02

 

[Neurobit]

That's good...I get 8-10 city (I have a stupid-short commute...)

 

[mikeru82]

I'm assuming you're relying on the fuel mileage calculated by the trip computer and not hand calculated. If so, I think ColoradoCub nailed it.
Just to clarify, you don't have a 21 gallon tank. The only tank sizes available for a 2019 Ram 1500 were 23, 26, or 33 gallons.

 

[Timeless]

The onboard computer for me is within .1 of my fuel app...so I think it is pretty accurate.

FYI I get 13-14 MPG and I have about 5600 miles on the truck now. Almost all city driving though.

 

[SD Rebel]

As mentioned, reset your computer and try to take it little easy and see where you can be. The Hemi acts like a turbo motor when it comes to fuel economy. Which means it actually gets decent mpg when taking it easy, but gulps down fuel when on throttle. It can be a huge variance depending on how discipline you are with the throttle.

 

[SCasey89]

As SD Rebel said, your driving habits can play a huge role in the mpg you see. There are also other factors such as does the truck have any type of lift and/or larger tires? Being a 2019, was the truck purchased new or used? If it was purchased used, you unfortunately don’t know how the previous owner treated the truck (driving habits, etc.).

 

[bobf5761]

Hi you all. New RAM owner here. I own a 2019 RAM 1500 5.7 Hemi Laramie Sport. Recently I have been getting 9-10mpg on the highway and in the city. It is driving me crazy. I recently did a road trip (towing 4,000lbs) and that's when I noticed it changed. Even though I am not towing now the mpg has stayed the same. Before I towed I was only getting 12 mpg. I have the 21-gallon fuel tank and have to fill it up every 2.5 hours! So, I would love your opinions- should I add an additional tank? How can I fix this issue? Or should I just get a different truck or model and trade this one in?

i am having same issue. 2019 ram rebel 5.7, Iam only getting 7.5mpg and 180 miles per tank. Iam thinking I should have kept my 2016 big horn 5.7, i was getting 400 plus per tank

 

[ferraiolo1]

Letting it warm up every time you drive it? Giving it lots of gas from starts? Did you lift or change tires?

It all affects the computer generated estimate.


Sent from my iPhone using Tapatalk

 

[Eighty]

You sure you aren’t using this?

 

[Washy]

i am having same issue. 2019 ram rebel 5.7, Iam only getting 7.5mpg and 180 miles per tank. Iam thinking I should have kept my 2016 big horn 5.7, i was getting 400 plus per tank

Same problem here. My 2014 was getting 19-22 mpg and I'm only getting around 15 mpg with my 2019.

 

[2019 Ram Rebel]

My Rebel gets 13.3 MPG (city) & 15/16 HW, with a level kit and 35” BFG KO2’s. I have a 23 gallon tank. The calibration for fuel for the Hemi is calibrated to alert you with approximately 4 gallons left till empty due to the Hemi not liking to run dry. It’s a safety feature for the engine and the driver. Prior to me knowing this, I always thought I had a 19 gallon tank. You can upgrade the tank to a 33 gallon but it’s pricey ($800-1200) doing it yourself (big job) with approximately 150 more miles till “empty” so I opted for a 32 gallon portable tank with an 8’ gas line to put in my trailer to put gas in my truck and sleds. It was $200 bucks lol. Bottom line, these trucks like gas

 

[Willwork4truck]

My Rebel gets 13.3 MPG (city) & 15/16 HW, with a level kit and 35” BFG KO2’s. I have a 23 gallon tank. The calibration for fuel for the Hemi is calibrated to alert you with approximately 4 gallons left till empty due to the Hemi not liking to run dry. It’s a safety feature for the engine and the driver. Prior to me knowing this, I always thought I had a 19 gallon tank. You can upgrade the tank to a 33 gallon but it’s pricey ($800-1200) doing it yourself (big job) with approximately 150 more miles till “empty” so I opted for a 32 gallon portable tank with an 8’ gas line to put in my trailer to put gas in my truck and sleds. It was $200 bucks lol. Bottom line, these trucks like gas

link for that portable? Other drivers with the 23 may want it. All safety considerations valid of course.