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  #1  
Old 12-24-2011, 01:17 PM
Poppa Bear Poppa Bear is offline
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Default Need Idea's to improve mileage

I just picked up a 1996 Ram 5.9 4x4 , this is my daily driver, as far as I know its stock with 285's for rubber , I know mileage will be around 15-17 mpg , looking for a way to put it up around 18-19 . I know air intake , and exhaust but what size pipe to use , also do they make a lock out kit for Dodges?
Any other input s would be appreciated.
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Old 12-24-2011, 01:25 PM
joshrk joshrk is offline
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I'm not sure if you'll ever get those #'s with the 5.9. My '02 has the 5.9 and I barley make 12 mpg.
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Old 12-24-2011, 02:36 PM
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Note sure about your year but the exhaust and the tuner made a big difference for me. I also have a K&N drop in however that did not seem to make as much difference as the other two. Actually 15-17 seems pretty good for that year and engine, is this all highway or mixed ?
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Old 12-24-2011, 05:00 PM
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With those size tires? I seriously doubt you're going to see 15-17 unless you're all highway miles. I've had two trucks with this engine and I did all the tuner, exhaust and intake modes and had smaller tires than you. I got 8 mpg on both of them. Mostly city driving.

*edit* forgot to add, I had headers on the last truck too. Still struggled to get to 9 mpg. The engine just isn't made for mpg AT ALL.
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Old 12-24-2011, 08:25 PM
Poppa Bear Poppa Bear is offline
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Most of my driving is HWY driving average 30miles one way , just hope I didnt shoot myself in the foot by getting rid of my 97 F150 4x2 v6 avr 20 mpg ill settle for 17 if its possible ,

PS does anyone know if anyone makes lock outs for the Dodge?
thanks for the replys
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Old 12-25-2011, 11:42 AM
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Quote:
Originally Posted by Poppa Bear View Post
Most of my driving is HWY driving average 30miles one way , just hope I didnt shoot myself in the foot by getting rid of my 97 F150 4x2 v6 avr 20 mpg ill settle for 17 if its possible ,

PS does anyone know if anyone makes lock outs for the Dodge?
thanks for the replys

Hate to say this, but if mileage is/ was your only concern you blew both your big toes off.
You traded a lighter vehicle with a smaller engine for a heavier vehicle with a larger engine. Basic physics states it ain't gonna happen.
Lockouts are not going to help you here because your axle disconnect (CAD) system doesn't allow an unlocked differential to turn and rotate the front shaft.

The cost of lockout system is about 1000 bucks plus new rims because you need rims with larger diameter hub holes. I determined about two years ago that even with a 1 mpg gain the and not having to replace hub bearings it would take 6 years to recoup the cost.

Here's my suggestions...

Remove those heavy tall 285 tires and run a stock 245 size and purchase tires with the least amount of road resistance. You can find resistance ratings on the internet. Keep at max pressure.
Smaller lighter tires require less torque and horsepower to move (unsprung weight). Lowering the truck lets less air pass under it where the most parasitic drag occurs.
Have your truck aligned front and rear and never take it off road to throw it out. Remove all aftermarket lifts and anything that induces undercarrage drag or adds weight.

Revove all misc junk and unneeded stuff from the bed and cab.

You can install a K&N drop in air filter element or similar brand. You might add a 3 inch low restriction single tailpipe exhaust to increase low/mid range torque. Make sure your truck is in a good state of tune and clean your throttle body regularly including your idle air intake valve.

Buy a vacumn guage and drive by it. I hope you don't get shot for creeping along like a little old man.

Others may suggest all kinds of expensive mods which when done all at once may have some merit. The problem is your truck was only rated at 16 mpg average to begin with. Remember that gas was only 1.68 a gallon when these trucks were first built.

FTR...my truck averages about 10 mpg city and if I'm lucky, 13 mpg highway.

Last edited by Okiespaniels; 12-25-2011 at 10:31 PM.
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Old 12-25-2011, 09:51 PM
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Now what you have up there is some good advice!
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Old 12-26-2011, 03:18 AM
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Thanks for the input , I do plan on down sizing the tires and replace AF guess ill just have to learn to keep out of the throttle , back it down to a double nickle driving habits; but hey I love the truck so guess if your going to play guess you gotta pay.
thanks again for inputs if i find something that makes a different ill report back.
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Old 12-26-2011, 12:18 PM
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15-17mpg? Man, I would love to see those numbers. But, I've never seen those. Best I've ever seen is 12mpg. Currently running about 9-10mpg due to some "technical difficulties", but, I'm also running 305's. All in all, if I were you, I would definitely be grateful for the mpg's your getting already.
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Old 12-27-2011, 06:58 PM
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I havent seen the mileage on the 1996 2500 yet as its currently in repair, brakes , fuel lines all the neglected mechanical , the 15 -17 mpg was in reference to the 2002 1500 4x4 5.9 I had; im getting a little worried that this beast is going to need a Iv plumed to my wallet.

Last edited by Poppa Bear; 12-27-2011 at 07:00 PM.
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