That means, if you're filling up a 36 gal tank, you're paying for $14.72 cents worth of fuel that you aren't getting (assuming fuel is $4.09), or a deficit of 3.6 gallons. That could definitely throw off any mileage calculation.

I did the math. Say hypothetically, you traveled 700 miles on a 36 gallon tank. Assuming it was filled up, you get about 19.44 miles/gallon. If you have a deficit of 3.6 gallons, you'll assume you had 36 gallons in there, when really you only have 32.4 gallons in there. That drops your mileage calculation down to 17.5 MPG.

Id say its a possibiltiy Mark.

 

Man...I did NOT need to hear that!!! It serves to confirm a suspicion that I have been having lately...damn it!!!!

 

I'm back at the RV, Jody had that thing out done and back and running in less than an hour. I got the exact same thing as Barry. I did compromise the test a little. I let it idle last night for at least an hour trying to stay warm in that clown Gore's global warming that does not seem to be affecting even Georgia. I drove 30 mile's to Jody's and last night in the truck stop on the Superchip. Found fuel at mile 104 I-85 SC for $3.91. It got 21.5 mpg, so no complaints on this end. I would bet anything that that Petro screwed me either intentially or by accident. But there is no way I only get 17.9 at 63 mph. I did try the 120 setting when I reached the road where I'm parked. WOT fried the tires and the first smoke I've seen since we put the 6637 in just before I drove to Alaska last time. Jody played with the smoke setting before I left his place so that may explain a little of the mpg. I fully expect to be back up to 24 mpg as soon as I get back to my Alta Kaaka driving that is an economic requirement for me nowadays.
Yes I did, it was miserable. I'm getting way too old for that crap. My last trip to Alaska I spent 6 nights in the truck. I was nearly dead when I reached Fairbanks. All I could hold down for 2 days was yogurt. That's info I'm sure all of you needed.

 

Mark, is that all you are going to tell us about the DP? What tunes and what do you think about them? Come on MAN.

 

No start, stock, 60 tow, 80E, 120, 140. My new sig. says it all.

 

OK, but I kept my superchip to read codes.

 

From what I have found, it is OK for them to be off as much a 10% and some states only check them every 4 or 5 years unless someone complains, then yes, we are sorta at their mercy. I guess now that fuel has topped the $4.00 mark, it is time to check them ourselves.

Mark, sorry I missed you call earlier, even I have to sleep once in a while. Trying to get ready to head out to GA myself. I will call you on the road.

EDIT: Mark, you missed one, I also got the 80T for my boat.

 

Jody missed it, not me. I just told him I wanted the same thing you got and I did not have my computer on at the time so I took his word for it. I did tell him the only thing I thought I would ever tow was my Vdub though, so maybe he went by that. That thing can't weigh 1800 pounds at the most.

 

You could tow that in your 80"E" setting. No need for the tow tune.

Congratulations on the DP.

 

I'm going to try the stock tune if I drive the truck this weekend. Don't know as I also accomplished stopping at a DMV in SC and finally got the plates for the Vdub. Very impressed with SC's Dmv service. I was in and out in a half an hour. It took me almost 4 hours to get the NC title, and then another 3 weeks to the day to get it in the mail. But I remember when my Superchip died a few years ago and I was stock for 10 days or so I did not even like the truck anymore.

 

Just for the Hell of it, I drove mine around today in the stock setting. Man, y'all that are running without some sort of performance chip haven't got a clue what you're missing out on. It even makes me appreciate my old chip.

 

I had to drive mine a couple times stock for a week or so and couldn't believe I was once happy that way
after replacing hypertec with DP pulling the hills in Ga I couldn't believe how much better it done again,where it use to downshift it just started pulling harder in OD in either tune
BTW seems my best in town fuel milage is in 40T

 

[quote=Markadeck;6106015]only got 17.9 mpg. Probably the worst mpg hwy I've ever gotten with this truck. quote]

Good thing you dont own my truck. I would kill for that mileage.

 

Had to do an unplanned for fillup today cuz I did a man a favor with my truck and he wanted to fill it up so I gotta post these results after only 312 miles. 75 of them on the 80 setting with one WOT blast in the 120 setting, the rest on 60T. These are all city and country backroad driving, but the bottom line turned out to be 21.2 mpg. I did not really care for the 60T setting because it downshifted too much on little hills. Which North Carolina is riddled with. I now have it on the 80 setting and will try and make it though most of the 39 gallons with it on that, and do my best to keep my foot in connection with my common sense.

 

Come on now Mark. You haven't had the tuner that long so don't worry about connecting that foot with the dreaded common sense just yet. Go ahead and rip off a couple more 120hps and maybe a 140hp.