[Nagakilo]

Howdy Ladies and Gents

So I've got a bit of a question. As my signature states, the next mod I'm looking into is a SCT Tuner. So I've heard in some places when you get a power tune your really gonna get screwed when it comes to the mpg. So I was looking into getting two tunes, first being the power tune, and then more importantly a fuel effeciency tune using the same 91 octane gas as the power tune (I see people mention 93, but my local gas stations only offer 91) This is my daily driver so I can only use the power tune for fun days like weekends and it's simply too expensive to run 91 octane without gaining something from it.

To the matter at hand though: Has anyone ever done this before: Swapping between two tunes regularly (Fuel Effecient Sunday through Thursday, and Power Friday through Saturday)? Is there any risk to the ECU doing that? Also does anyone know what kinda MPG gains you can expect from a 91 octane fuel effeciency tune? I already get 22 mpg and was hoping I might get up to 25 (I wanna beat my friends 4 cylinders in power, style, AND fuel effeciency lol)

Any input would be appreciated

[dtuna42]

the only reason you'll get screwed in mpg is because you'll have so much more fun winding it out you'll be doing it more often

[shinerstang]

Originally Posted by dtuna42

the only reason you'll get screwed in mpg is because you'll have so much more fun winding it out you'll be doing it more often

+10!!!!!! It's like dual exhaust. Sure, the statistics say that it will breathe better and give you better mpg, but who the heck grannies their car when you like the sound?

You can get both, but I would suggest an 87 octane fuel efficient tune and a 91 performance tune.....

[Nagakilo]

Well, the only reason I was saying 91 oct fuel effecient is because I'll be switching the tunes out on the weekends and I get about a week and a half a tank. I was thinking that if I'm gonna have the 91 octane in there I may as well use it (Assuming it can be used for a few mpg's)

[Cusp]

Originally Posted by Nagakilo

Howdy Ladies and Gents

So I've got a bit of a question. As my signature states, the next mod I'm looking into is a SCT Tuner. So I've heard in some places when you get a power tune your really gonna get screwed when it comes to the mpg. So I was looking into getting two tunes, first being the power tune, and then more importantly a fuel effeciency tune using the same 91 octane gas as the power tune (I see people mention 93, but my local gas stations only offer 91) This is my daily driver so I can only use the power tune for fun days like weekends and it's simply too expensive to run 91 octane without gaining something from it.

To the matter at hand though: Has anyone ever done this before: Swapping between two tunes regularly (Fuel Effecient Sunday through Thursday, and Power Friday through Saturday)? Is there any risk to the ECU doing that? Also does anyone know what kinda MPG gains you can expect from a 91 octane fuel effeciency tune? I already get 22 mpg and was hoping I might get up to 25 (I wanna beat my friends 4 cylinders in power, style, AND fuel effeciency lol)

Any input would be appreciated

My performance tune gets a little better MPG around town than the road race tune does. But driving them both I can tell its because the road race tune delivers more grrrr. And grrrrr only comes from fuel. On the highway, I couldn't tell a difference if I am loafing along in either tune they are the same MPG wise.
The Performance tune seems like it takes off from a stop quicker. And the road race tune seems like it makes a little more power in the upper half of the RPM range.
I am waiting for Chris's All Out Tune to be emailed to me. Supposedly, that one has both ends covered.
The tune netted me about 1 MPG in town and about 2 on the Highway.
It will be hard to beat a lighter 4 banger in the MPG game, but at least you should be able to get close. I have seen 32 MPG on the GT by keeping the speeds down between 50 to 60 but that's not typical. I think there was a semi 50 yards in front for that one. But more typical for a road trip is 26 to 28 running 75 MPH.
This is an interesting compare. My 2.3L Ranger Standard Cab and bed with a cab high topper gets the same or slightly worse MPG than my 4.6L mustang. Several MPG worse at higher speeds. Go figure.

[amustangrocks]

Originally Posted by Nagakilo

Well, the only reason I was saying 91 oct fuel effecient is because I'll be switching the tunes out on the weekends and I get about a week and a half a tank. I was thinking that if I'm gonna have the 91 octane in there I may as well use it (Assuming it can be used for a few mpg's)

where are you buying the tuner? usually you get 3 tunes with it. i went with the 87 performance( in case gas hits 4.00 again,could run 89 with it) the 91 performance in case i ever take a long cruise while ive got 91 in the tank, which i never use) and a 91 street race tune( that i use full time) i dont have 93 around here either. but i was about 40 miles from here today and they had 94. if they were closer i would want that tune i think you`ll be ok switching tunes, but you may decide to run 1 all the time