What chips can I add for better fuel performance when pulling my 5ver ?

 

Are you wanting to do a full emissions delete or leave everything on?

 

I'm not sure at this point.
Definitely not emissions because I go into California.
I'm looking just to increase my mileage pulling my 5th wheel trailer.
The mileage I get now is twice what the V10 I had got

 

In my opinion, if you aren't going to do a full delete, you aren't gonna gain what you seek. The 6.7 does pretty good stock with both mileage and power. Only noticeable gains are with the rocket/space ship off the truck.

 

ROTFLMAO about the space 🚀 comment.. First thing when I opened the hood was ... Might as well be the space shuttle 😁

 

The emissions systems on these trucks are pretty finicky, and altering their function via tuning doesn't usually turn out all that well.... especially for those who tow.

Everyone has their own opinion, but mine is: don't tune a 6.7L with stock emissions.

 

Thanks... I only tow me 5th wheel RV trailer and my chp friend in California said don't do it cuz California is doing random inspections at all inspections stations and with my luck I'd be the one checked 😁

 

After driving a tuned and deleted 6.7L for over 55k miles, I am certain you will not see mileage gains unless you delete it. You best bet for mileage gains is controlling your right foot and using your head, correct tire pressure and up to date maintenance.