Fuel economy cause

[jeeper]

I’m happy when my wind catching SxS’s and trailer allow me to hit 7mpg when towing. I’ve been as low as 4mpg in head winds 😭 took 3 stops to get to St. George 💸💸💸

 

[Herzog]

I've heard you can do a pressure test pre and post cat. Just drill a hole small hole that you can tack-weld back closed an exhaust back pressure test gauge to test the pressures. That will for sure let you know what's up with the cats.

 

[Herzog]

Wow that’s nasty. I averaged 11.4 mpg towing down and back from Sand Hollow.

I got 10.4 with the ecobooffft

 

[I Lean]

I've heard you can do a pressure test pre and post cat. Just drill a hole small hole that you can tack-weld back closed an exhaust back pressure test gauge to test the pressures. That will for sure let you know what's up with the cats.

An IR thermometer can tell you something also. Temps before and after the cat....should be hotter after.

 

[Hickey]

I’m happy when my wind catching SxS’s and trailer allow me to hit 7mpg when towing. I’ve been as low as 4mpg in head winds 😭 took 3 stops to get to St. George 💸💸💸

6.2 life. I remember that pain.

 

[Hickey]

But you have an awesome small and light trailer.

Yes, and I was in a big damn hurry to get home so I didn’t kill any nuns with my scary trailer.

 

[Tebbsjeep]

I've heard you can do a pressure test pre and post cat. Just drill a hole small hole that you can tack-weld back closed an exhaust back pressure test gauge to test the pressures. That will for sure let you know what's up with the cats.

Looks like I can get one pretty cheap
www.amazon.com/gp/aw/d/B09SYZPPJ4/ref=ox_sc_act_image_1?smid=A12YV543MOKK0Z&psc=1

 

[Herzog]

Looks like I can get one pretty cheap
www.amazon.com/gp/aw/d/B09SYZPPJ4/ref=ox_sc_act_image_1?smid=A12YV543MOKK0Z&psc=1

With that one it looks like you can just unscrew the 02 sensor and plug it in. I might have to pick one up just to have around

 

[Tebbsjeep]

Well I purchased the above tester, and low and behold, my cats flow free as a hippie. I already had new O2s so I installed them after testing each side. No noticable change.

 

[rholbrook]

I don't think you have an issue other than telling the truth. We finally have a Dodge owner telling the truth about their MPG or one that has good enough eyesight to see what it says.

 

[Tebbsjeep]

Realization is the first step lol

 

[N-Smooth]

My '12 Hemi very rarely got single digit mpg's. One time I was towing back from Idaho X Rocks in the middle of the night, going 90 into a headwind and I'm pretty sure I got like 8.

 

[Tebbsjeep]

Is that with the cylinder shutdown stuff? Mine doesn't have that.

 

[N-Smooth]

Is that with the cylinder shutdown stuff? Mine doesn't have that.

Yeah it had MDS

 

[DAA]

My '13 has MDS but I don't think I've ever driven it gently enough to activate. I have honestly never been able to tell, anyway. But either way, the only times I've ever seen single digit MPG is towing heavy and fast.

- DAA

 

[Tebbsjeep]

I wonder if I'm the lucky person who got one of the lemons that sets the curve for why "xyz trucks suck".

 

[mbryson]

I wonder if I'm the lucky person who got one of the lemons that sets the curve for why "xyz trucks suck".

That's my luck with Chrysler products

 

[Tebbsjeep]

Well I just drove about 150ish miles on I15 today. I reset the mileage counter to see what the freeway number was. On the way down to Provo I got 12.5 @ 70mph. The way back I peaked at 13.4 @ 65mph.

I think I'm going to stop chasing the issue. My truck just gets what it gets. 8.4 city/12-13 freeway.