Compromised Gas Mileage with Lift

Nitto Ridge Grapplers

 

The 305/55-20 Mud Claws I had put on a few weeks ago weighed 70-75 pounds each. Don’t look like they’d be so heavy until you grab one as you’re walking.... then you’re NOT WALKING anymore.

 

I went from a completely stock truck, changed the tires out to a bit more aggressive tire (goodyear ultra terrains, stock size) and lost a solid 1 (if not 2) mpg. Stock size tire, still p-rated, just a bit more aggressive...ate up a mile or two per gallon.

Its just bound to happen.

 

I have 2015 Ram 2500 4X4 6.4L Hemi. When I ask these people about better mileage the response was "if you want to haul or tow mileage per gallon isn't an option". That is a big lie, I am getting 18 to 20 mpg empty all day long. I done a bunch of research on the old Hemi to the new to figure out the reason the older Hemi's got higher mpg. One of the big things Ram has done is choke this engine down so bad there is no wonder why. The back pressure is so bad it's building up so much exhaust it's choking it's self.
The back pressure needs to be reduced and I have found two different ways both require to discard the "Y" pipe, in place of the "Y" pipe install an "X" pipe or install 3 inch pipes from cat's back to a Flow master muffler that is two 3 inch pipes in and out the "X" is built internal to the muffler.
My truck not only increased mpg but hp and torque. Before doing this it didn't have the power to pass anything it towed and hauled but was a big POS. know if I nail the throttle it goes sound is awesome and I couldn't ask for better results.
The one problem you will have most muffler shops say that you need that back pressure so most won't due a true dual exhaust system one of the reasons is they are not smart enough to no that the cat's stay there your either install an "X" pipe or Muffler with built in "X" pipe.
Enjoy your new truck

 

I have 6" lift on 35" tires MT but not super aggressive, 12" wheel and I get 15.5 recalibrated. I eas in the upper 16mpg before all of it. My mikeage is pretty mixed. Now if I ran 80 plus and heavy foot I'll dip into the upper 13's.
I run a Pulsar mostly stock w MDS on.

 

Lift will effect your hwy mpg more than city because the extra wind drag comes into effect. Tires will have greater effect city driving trying to get a heavier rotating mass going over and over. Wider tires also have more drag, which effects all. There's a reason high fuel economy vehicles sit low and have skinny low resistance tires. I have nitto ridge grapples. I like them, but they're heavy and I notice an mpg drop when they're on even with my mostly highway miles. I wouldn't trust any intakes, tunes etc to gain you mpg on a gas engine. The manufacturers spend countless dollars trying squeeze out every mpg they can.

 

I never could understand the whole "Big tire" thing,,makes no sense especially if its a road warrior! Larger tires do not help you unless you are driving in alot of loose dirt/rock/sand crawling, we know there are alot of rocks to crawl over on the way to work! If your in Mud, a skinny tire is best, the only way a large wide tire helps in mud is if you have alot of HP and rpm's to skip over the deep mud.

Since I drive mostly on the streets, I have a stock lift, I don't race off road anymore and I work my truck so I have commercial tires (33") same size as stock.

I don't get trucks with gas engines anymore because of the efficiency of them, not just fuel, but power and torque which matters to me. I do have a few very high HP cars but then I race them...

To get mileage from an engine there is alot to think about, gearing, tire mass, vehicle weight and aerodynamics. Common sense would tell you that bigger tires, lower aerodynamics factor would affect your MPG's. You want to get your mileage back? get skinnier tires and drop that truck back down!
You would also need to make your engine as fuel efficient as possible, but that is another story.

 

Should have bought a Cummins.

31mpgTampa2Naples2Miami
28mpgsTampa2Orlando
29mpgsTampa2Miami
29mpgsFtMeyrs2Miami
32mpgsKingman2Phoenix *
NewOil 10-60w pennzoil platinum plus premium oil
32mpgsSanBerna2LasVegas
31mpgs MorroBay2SanFram
30mpgsVegas2Laughlin
31mpgsEugene2Portland
27mpgsVegas2Portland
30mpgsDallas2BullHeadCity
April 21-24,2020
26mpgVegas2Texas coldair
29mpgSanAntonio2Houston
28mpgElPadeo2SanAntonio
30mpgVegas2Phoenix
26mpgMississippi2Vegas
30mpgPortland2AmarilloTx
27mpgTacoma2Portland
26mpgOhio2ldaho
24mpgPennsylvania 2NC
27mpgMephis2Pensacola
28mpgGreenBay2Chicago
27mpgIndianapolis 2GrRap
28mpgJacksonville 2 WaDC
31mpg Ok City to Dallas Tx
27mpg Houston to El Paso Tx
27-33mpgs freeway 60mph
18-20mpgs city driving 10-18mpg off road
10-18mpgs tow 6kLbs Boat

2015 2500 Tradesman Cummins 6spd 4x4 4door Deleted 4" pipe, KN flat air filter camper shell EdgeCts2
Baja front Cow Deer Grill
3 light bars =970watts front
1st responderCERT 10k lbs. TransforceHt 2757018 tires
Deleted PFdiesel.com @78k
25-32mpgs freeway
15-20city,
10-15 off road

Efficiency is measured TonXMiles per gallon used by scientist in the diesel truck industry.5.2tonsX28+mpg= 146TonMile/gallon

Toyota Prius is 3200=1.6tX50 mpg=80TonMile/gallon

Railroads 500ton mile/gallon

18wheeler 7x20=140tonMile

6 way MPGs calculated=
1-RAM computer
2-Garmin gps
3-Google maps gps
4-USGS maps Android
5-AAA maps Android
6-hand=4 semesters calculus

Cummins ECONOMY TIPS
1:Speed 55-65 mph
2: Close Windows
3: No items on top of car
4: Make truck aerodynamic
5: Inflate tires maximum 80?
6: High rear end gearing3.42
7: Factory tall tires 70s
8: 5-40w Synthetic Oil
9: avoid 4x4 driving
10: Remove excessive weight
11: Fuel is heavy too
12: Plan journey wisely
13: warm up engine
14: clean outside
15: Avoid RAIN
16: No aggressive driving
17: Don't over-rev.
18: Gear fast, slow accelerate
19: Avoid idling.
20: Overdrive & cruise control
21: Ele&AC worsens MPG
22: Exploit cruising down hill
23: Avoid a complete stop
24: red>roll in neutral gear
25: Tune engine to low HP
26: Change oil regularly.
27: Replace air filters asap
33: Leave early Family drama
34 constant Mph=Mpg
36: avoid drama & stress
37 Park in shade
38 cruz2 save braking
39: Forced induction =MPG
41:Rough asphalt tire wear7%
42:Use brakes to slow down
43change fuel filters often
44change power train oils
45avoid wider tires
46avoid jacking truck height
47used tires =better MPGs
48TenDegrees=HalfMileMpg
49 rpm 1400-1600

Obama Diesel Exhaust Cooker warranty expired 80k. 3rd Cooker by 75K so @78k I deleted.
Saving fuel & costs 10c mile = $1000/10,000 miles
Or $10,000/100k miles
So if I deleted, 300,000 = $30,000 fuel & cost savings 2016to2020

Some attack so I fight back. 151IQ. Top1%USA. 780+ escrows 750+ text books 4 semesters calculus. On 6th passport. 8 states gun Ccw permits. 199 court cases. Own 8000+ acres California no loans since 1991. No drug's smoking or booz. American Red Cross VIP blood donor card since 1991. fico 826+

 

37's and 6" lift and I'm averaging 17 at 65. You probably need to calibrate your speedometer.

 

I have a pulsar tuner installed to recalibrate my speedo and added performance. The MPG with the tuner is around 13.5. It’s not bad but not great. The MPG is probably the best it’s going to get because of the 37s I have.