For those who have a MPG map, What is your fuel economy. I get around 34.7 MPG at 55 MPH using Cruise Control and 31.2 MPG at 61 MPH using Cruise Control. Both with A/C Running on High. I was thinking of tuning a new map for cruising at 80 for highway use. Let me know your best.

~Craig

 

Here are some Pics.

 

A retune actually makes the MPG gauge less accurate. Have you verified by hand yet?

But those numbers are believable. I got 30mpg at 65mph with no tune on my G.

 

djamps,

You were right. The MPG meter was off. I drove back from Daytona Beach, FL to my home in Moncks Corner, SC (340.6 Miles) on just over half a tank (~9 Gallons). I calculate that to be about 37 MPG. I'm definitely happy with it, just sucks having to drive 55 -60 MPH the whole way. I should have come up with a tune for 80 MPH before I left. Lesson Learned.

Anyone else have a MPG tune?

 

air resistance is exponential so you'll drop off gas mileage big time going up to 80mph.

You can't estimate by the gauge that you used 9 gallons. The only accurate way to do it is to use a full tank and refill. That also gives you a more realistic mpg since you are averaging it over many miles. Also, this won't work properly if you have changed tire size since that will throw off the mileage traveled so that must be taken into consideration.

Like djamps was saying, if you change the tune the computer still thinks it's flowing the stock amount of fuel through those injectors so it won't calculate it correctly. This changes huge with different injectors too.

The dope in MPG for the speed increase sounds about normal though. That's why all fuel economy is tested at 55mph. After that the air resistance will destroy fuel economy. that's why i drive the speed limit or slower.