Economy tune

[ramthis9501]

I know there's some guys on here running programmers and I need some advice. I've been running the performance tune on my truck ever since I got the programmer and love the power. But ever since I got the 3.92's put in, I've noticed a drop in gas mileage.

No I haven't calculated it but it is definately a noticeable drop. Driving to Norman and back for work has been killing me, to much damn money to be burning premium. So my question is, have any of you ran the economy tune vs the performace tune and notice any difference in fuel mileage?

I don't want to lose the power but if it'll save me some money, I'll do it until I take it back to the track.

[DoubleTakeDodge]

Econ tune on my old truck yielded lower fuel mileage than the performance tune

[DoubleTakeDodge]

probably because of my heavy foot though

[ramthis9501]

I've heard that alot from people on forums, but I wanted info from people I know and trust on this stuff. Wonder what the point of an economy tune is if it doesn't help fuel mileage

[BMRbrnSNRbrd]

I saw the same thing with the eco tune. I just run the 87 tune right now.

[ramthis9501]

Any better mileage with that Dave?

[BMRbrnSNRbrd]

Not sure, when I want good mileage I just keep my foot out of it.

[ramthis9501]

So would it be worth switching over to the 87 tune or economy tune?

[DoubleTakeDodge]

Econ tune probably give better fuel mileage assuming a factory vehicle

[1Tuff6.7]

I know we're not comparing apples to apples here but I know the best way to get mileage out of my truck is to run it on the hot tune (175hp) and keep my foot out of it. The general idea behind it is that the engine isn't having to work as hard to move the truck at a given speed.

[DoubleTakeDodge]

I know we're not comparing apples to apples here but I know the best way to get mileage out of my truck is to run it on the hot tune (175hp) and keep my foot out of it. The general idea behind it is that the engine isn't having to work as hard to move the truck at a given speed.

This is why my truck had the best mpg on the 91+ Performance Tune.

[Lt.Dan]

Mine always got the best on the highest tune, but like you said, you have to keep your foot out of it. Which, is really hard. Haha

[ramthis9501]

Keeping my foot out of it is really hard to do haha maybe I need to try changing my driving habits a bit to see if that'll help

[DoubleTakeDodge]

As I got older my driving habits changed drastically and my avg mpg went from 10.7 to 13.5. It makes a good difference lol

[916Timmy]

I know the eco tune sucks unless you only drive on the highway.. I put it on last weekend and drove to lubbock anbd back...23 mpg going 65-70 with the tailgate down and fence stuff in the back. Around town it was a pig. I like the 91 tune, seems about the same mileage wise, but there is hardly any tweaks until after 2500 rpm in any of them

[BMRbrnSNRbrd]

As I got older my driving habits changed drastically and my avg mpg went from 10.7 to 13.5. It makes a good difference lol

This.

[1Tuff6.7]

Both feet do not have to be flat on the floor at all times young grasshoppa. Lol

[myoung84]

Both feet do not have to flat on the floor at all times young grasshoppa. Lol

This is good advise! :D

[Ramrod]

It appears you may have over-size tires on your truck. If you installed a lower ratio gear set, I would bet you have no idea about what the actual ratio is. In any case, over-size tires and lower gears are not a good combination for fuel economy. I don't think a tuner will help.

[Ramrod]

So would it be worth switching over to the 87 tune or economy tune?

The manufacturer says in the owners manual that it's ok to use 87 octane but they recommend 89 octane. Personally I would like to know what their test results were (if they performed one) on both levels of octane. When a specific recommendation is made, I would like to know why. Especially when there are 2 options.

It may be ok to use 87 octane but if you get lower MPG then the cost savings may not be worth it.

[918Dodge]

I have achieved anywhere from an average of 13.0 mpg on a 26 gallon tank to 20.0 average. Depends on idle time, for example in the cold i let my truck run for a bit first, kills mpgs, the variation in city and hwy travel, tire psi, etc etc. In the fall seems to be the best mpg's for me..

Keep your foot out of it :p In the 4 years I've had my truck since it was brand new.. the best remedy i can find is keep her under 2k rpm on accleration and i set the cruise at 68 mph.. with my 3.21's.. im about 1450 rpm all day long on the highway.. BUT we also have very different trucks.. lol

[Ramrod]

The only way to get the best fuel mileage is to keep the engine tuned up, the oil changed, tire pressure on the high side of maximum and a light foot.