Increasing MPG after installing lift and tires.

[ahallag88]

OP, I would just get AlfaOBD and correct the tire size. It is VERY easy and corrects the Odometer, speedometer, and MPG calculations. You will then also be able to change a number of additional things. For example, on my RAM, I changed the running lights to the amber turn signals (looks SOOO much better), enabled the Off-road pages, and turned on the tailgate ajar warning.

On another note, I did a 3"front/2" rear lift/level and have 35" Yokohama Geolandar A/T G015 295/65r20 tires. My MPG averages 15.5-16.5 with mostly in town driving to/from work.

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Nice looking rig. I think I am going to go with AlphaOBD. I called the dealership to see if they could do it, and service manager gave me a spill about a recalibration contract through Chrysler and that Chrysler may not approve a calibration for tires at 35”. So I’m not wasting $150 bucks for them to possibly tell me that Chrysler wouldn’t allow them to do it. Is the Alpha OBD rather easy to use?

 

[Idahoktm]

Nice looking rig. I think I am going to go with AlphaOBD. I called the dealership to see if they could do it, and service manager gave me a spill about a recalibration contract through Chrysler and that Chrysler may not approve a calibration for tires at 35”. So I’m not wasting $150 bucks for them to possibly tell me that Chrysler wouldn’t allow them to do it. Is the Alpha OBD rather easy to use?

It is fairly easy, but it's a little confusing at first. I tried to recalibrate my speedometer using written instructions, but I was unsuccessful. After watching a few videos, I gave it another shot and it worked. Now that I've made a handful of changes with AlfaOBD, I am definitely more comfortable using it, but I still need to follow instructions step-by-step or watch a video before I dive in.

 

[ahallag88]

It is fairly easy, but it's a little confusing at first. I tried to recalibrate my speedometer using written instructions, but I was unsuccessful. After watching a few videos, I gave it another shot and it worked. Now that I've made a handful of changes with AlfaOBD, I am definitely more comfortable using it, but I still need to follow instructions step-by-step or watch a video before I dive in.

If I’m reading correctly online I have to buy the obd adapter/connector then the software from the alfaobd website?

 

[Idahoktm]

If I’m reading correctly online I have to buy the obd adapter/connector then the software from the alfaobd website?

You'll need a security bypass, OBD2 scanner, and the AlfaOBD software. About $100 total.

https://www.amazon.com/gp/product/B005NLQAHS/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1

https://www.amazon.com/gp/product/B08DLB6VH6/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1

 

[Lpsouth1978]

I use this Security Bypass, and this OBDII scanner. $46+$50 (AlfaOBD software)

 

[ahallag88]

You'll need a security bypass, OBD2 scanner, and the AlfaOBD software. About $100 total.

https://www.amazon.com/gp/product/B005NLQAHS/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1

https://www.amazon.com/gp/product/B08DLB6VH6/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1

Thank you for the info. I certainly appreciate it.