What are the best mods for increasing mpg?

 

What kind of mileage are you getting?
12-15 is good for your truck.

Other than that the best mods for mileage are little itty bitty tires, weight reduction, and keeping your foot off the skinny pedal.

 

i got 11-12 mpg on the hi way very acurate reading bcause i ent on a trip so i calc then.also i had a very very very bad plenum leak and now is fixed with smoothed mod.ihavent done a mpg calc yet but i better b geting 15-17.flowmasters,wires,3923,5.9,99 ext 6ftb

 

I think Im gettin around 12

 

15-17???

No offense man, but I think you're dreaming. Maybe you'll get that on the highway, but thats at very best. 17 or 18 is considered good for the 5.2, a 5.9 drinks a bit more.

 

Well then you're getting decent mileage. Wouldn't worry about it. If it starts to get bad you might have a plenum leak, but as it is it looks like everything is okay.

 

Back to your original question.

Stock Tires: 245/75/16. If you want larger, get something with a low rolling resistance rating. (no mudders)
Tune Up: Dist/Rotor/Wires/Plug
O2 Sensors: Downstream (had mine replaced and cannot vouche about it).
Go Synthetic: Motor/Axles
Driving Style: driving like you have an egg under the throttle.
Transmission: a good transmission will help, make sure you are getting TQ Lockup.

I am sure there are more, but these are the ones i stick to.

 

There is a forum member- HankL. Search his posts for many, many ideas on how to get better fuel mileage.

 

You can get your MPG up to 15.5 or better
as an average for all driving with
choice of tires,
some aero mods,
and a few inexpensive changes.

This is a long read:

https://dodgeforum.com/m_447500/tm.htm

with more money spent
you can get your city MPG for a gasoline Ram to 17
and highway MPG to 20 MPG at a steady windless 70 mph
with a 5.9 V8

On the other hand
a 1998.5 Cummins Ram 12V 2wd
will get those numbers on diesel with stock tires and no mods

 

i get 9-10 mpg. so be happy with 12!

also... theres this thing called "search" at the bottom of the page... pretty useful tool.