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Just over 19 mpg on a 5 hour trip, no gunning it either. My mileage sucks. Maybe I need new heads and pistons.
my mileage has increased a little after the 4.10 gear install...maybe that's what you need. ;) :D
 

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I get around 19 - 20 mpg on long trips running 75 or so. How are you getting 26 mpg? are you going off the computer or actually starting with a full tank, recording miles driven and then seeing how much gas you have to put back in? 26 sounds too high for the LS3 depending on your speed.
 

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Idling downhill in neutral at highway speeds. 99MPG, accelerating.
 

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On my vacation I had an 8 hour drive each way. On the way there, I got 24.5 (CAI, DT shorties, no muffs, Diablo Perf Tune) after getting the SC installed and dyno-tuned I got 27 on the way home! 75mph avg.

Of course when I am in the boost, things are very different! :lol:
 

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2 weeks after i got mine i got around 28 mpg and making sure i did not stay at a constant speed got over 500 miles on a tank of gas :thumbsup: Will get a better reading when i take it to Canada for the Oshawa meet and greet in August...
 

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Mine also obtained 24 MPG on my trip from Michigan to South Carolina. And about the same on the return trip. Very happy with the 2SS LS3. Turned a lot of heads too.
 

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Did a 415 mile run yesterday. Cruising at 70 got 25.7 MPG on the way there. Coming home was a little different. 80 to 85, got 23 MPG.
 

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I'm getting 15.5 - combo highway and suburbs/stop and go. I've lost .2 mpg since last Friday when I had my Corsa Cat Backs put on. Ponderous, I tell you. Looks like I need to drive my Smart Car more often so my total "average" mpg goes up.
 

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I'm getting 15.5 - combo highway and suburbs/stop and go. I've lost .2 mpg since last Friday when I had my Corsa Cat Backs put on. Ponderous, I tell you. Looks like I need to drive my Smart Car more often so my total "average" mpg goes up.
Do you have an A6? I have a Corsa on and your mileage seems consistent with mine. I had one tune last October after the exhaust was instaled, but I'm thinking maybe I need another one!
 

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I have a Corsa and LMR intake, gettin 16.4 on a daily 40 mile round trip. I don't have a tune yet so I'm still on the factory tune with the ECU adjusting to the changes. I'll be adding headers in about a month or so with a tune, I'll see where it goes from there. I'm ok with what I'm getting at this point, I spend more time at 15 MPH than I do at 70 MPH on my daily grind.
 

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TX SS - let me know how the headers sound with the Corsa. Have you decided on which header to get? Also, are you doing a shop tune or a hand held programmer tune?
 
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