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?

[Ramrod]

Originally Posted by ramthis9501 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.

[DoubleTakeDodge]

Econ tune probably give better fuel mileage assuming a factory vehicle