I have a 2006 Durango w/ 5.7L it was getting 15mpg in town 19 on hwy at 40000 mi it dropped to 12cty / 16 hwy I’ve installed cense then new plugs (ngk platinum V) K&N replacement filter (mpg jumped for 2-3 days then dropped back down) and bought a code reader to view the o2 sensors.

I've got front O2 sensors but hate to install them and not help.

Called Dodge Garage to put it on there computer but thay seem like its to much trouble, or they can’t find the problem.

Any help would be appreciated. Going out of town for X-mas. Gass is cheerer but every little bit helps.

Thanks
Chris

 

we've never seen that gooda mileage out of ours, as far as 15mpg. Our avg. is 11.5, maybe a 12 now and then.

As far as advice, obviously I have none to offer, Im looking for some myself. Good luck around here though, the D section is DEAD.