i loved the performance tune, but when gas got expensive, i just couldn't get myself to give those greedy aholes a penny more than i had to...LOL
I thought this too... Until I did the math on it
Here the 91oct is approx. $0.20 higher than the 87oct.
I picked up 2mpg from swapping to the 91 tune over the 87 tune
So say I fill up 20gal of premium fuel on the performance tune.
@ $0.20 per gallon extra, thats $4.00 more than I would normally pay for the 87oct.
However, @ 2mpg better, I am picking up an additional 40 miles per tank.
So for simple math, say 87oct is $3.00 per gal and 91oct. is $3.20 per gal. and its a difference between getting 12mpg on the 87oct vs 14mpg on the 91oct
In order to make up that additional 40 miles on 87oct I would have to buy 3.5 extra gallons
So an additional 3.5gal of 87oct @ $3.00 = an extra ~ $10.50.
Paying an extra $0.20 per gallon for 91oct = an extra ~ $4.00.
In the end, for the "econo tune", you actually end up paying more, $6.50 more to be exact. And what do you get out of it? A detuned vehicle running poorer gas.
Now I will say this, I did this pre-cam, pre-converter, pre-headers and after my gear install and I did it with both the DSP and the SC3815, the newer tunes may be more refined today with the newer software, however I am doubting much difference really in the mileage tunes.
It all goes back to what I have always said, make it run more efficently, make it get up to speed quicker and easier with less pedal and the mpg's will go up.