I have just installed a Hypertech on my 02 LB7...set on stage 2 & i baby it. I have still to run a tankful through it. What have others seen on their MPG...+/-??? Before i was gettin around 17 to maybe 18 tops...no pulling, just normal driving hiway & city. I'm wondering if the Predator would give me better numbers (+MPG was the main reason...well...+ some HP too for the tuner upgrade)

At first I gained 1 to 2 mpg. But now after 3 months, it's back to pre Hypertech days.
Could be the winterblend fuel though.

Well...So far no good...it's the same if not somewhat worse. Ran my first tank through it & got 16mpg. I did not lead foot it either...so much for the better MPGs...the main reason for the upgrade was mpg....SUX...I'm checking into a predator

I wish I could get that mileage. Not sure what you are complaining about. I get 13 combo.

The cold air has more drag.

I guess your right. But i sure would like to see 19-20mpg like some people say they get. I got a bud who has a dodge(chipped) don't know what brand & while riding with him i watched his computer display 21-22mpg going 75 for milies & miles. Also he claims 12-14 pulling a 11,000lb 5er

Can't believe everything you see on a gauge.

There is a recipe in the diesel. Get into 5th gear, locked up (usually around 50 mph), and stay there, around 1800 RPM. Just don't fall asleep. These trucks are parasitically bad, and not geared for 75 mpg efficiency. A larger tire does help that (note, not wider, but larger diameter) and helps you stay in the lower RPM range with highway speeds, though you lose a little pulling torque. You'll be able to enjoy great gas mileage all day long. 20 mpg plus.

Another beginner city tip: plan your stops, whenever you can get off the gas without having to hit the brakes, that 7500 lbs of kinetic energy you can take advantage of, at 200 mpg. Those dead starts consume a lot of diesel, getting the beast moving.

Suggestion: Create a signature, so people know how to respond.

bump what masterp said - there just way too many variable involved with getting what one might consider great mileage, it sounds to me like youre getting very good mileage as it is. the more constant driving, ie, no stop and go, the better your mileage will be. i dont really buy into the better mileage with a programmer as you might see an increase from time to time but again its the type of driving you are doing - with it chipped you are likely to hammer a bit more !!

Ditto above. I didn't notice any difference when I installed my Hyper at all. I average about 16mpg in town and anywhere from 17-23mpg on the highway at 70mph. I did notice a 1-2 mpg when I installed the MBRP. They Predator throws your DIC way off. I had one and it said I was getting 26-29mpg. The mileage was actually half of that(with hand calc). Had a bad head wind on that trip. :ro)

I just don't know where these better mpg stories got started. More horse power and better fuel mileage just don't go hand in hand. By the way, I have the Hypertech on mine. If you drive it exactly the same, you will --- or I do get almost 1 mpg more. But that is just too hard to do (drive it the same), I mean you always have to show off, or punch it because you’re mad at traffic or whatever.

I drive the same identical route everyday with near constant conditions short of wind or weather. I average 44,000 miles per year and it consists of Interstate and City driving daily. I get my fuel at the same place---by the way---the quality of fuel has a drastic effect on mileage and performance! Which in-part IMO is why you see some different results at different times, when all else is equal and why I always now buy from the same station. I have tested this thing in every setting one could imagine. So better mileage beyond 1 mpg just isn’t there. This is all in stage one with the Hypertech. It also throws off the DIC. In stage two and three it made the mileage worse. So stage one is the ticket for me.

Now the good news about Hypertech: It does scan and can erase codes. It compensates for tire size. It removes the rev limiter. It is a programmer and when you remove it, you can't tell it was ever there. And best of all---the injector noise at 2500 rpm is much quieter.

All of these programmers are great for towing, and that is were they really make a difference.

The same with fluids and exhaust, meaning they don’t change mileage much at all like some have claimed (I've tested all of that too) but that is another thread. I have not played with changing tire size, someone help me here?

So yes I recommend programmers and not necessarily a given brand, I bought the Hypertech because of price and the fact they have been around longer than all the others.

They have their place, but it is not for better fuel mileage.

My two cents.

Jumper357

I half to agree with Jumper, I'm lucky to get 14mpg :mad: with all said. I know I'm runnin' 35's :ro) and pumpin black smoke every chance I can get but its always been more of my driving style than mod's that showed the best gains. Drive it like the minivan always in your way and you'll see the big gains and maybe some better gains with it tuned, drive it like you stole it and no matter what kind of mods are in place you'll fail to realize any efficiency. I've seen all the stories about outstanding fuel economy too and when I read most of the sigs listed underneath them and all of the mods I tend to think they need a new calculater. ):h

Hey jumper...I'm assuming you like stage 1 better than 2 on your hypertech? & you get better mpg on stage 1? I'm running on 2 now...but depending on your experience , i may need to try stage 1

I gained 1 mpg, 13.5 to 14.5. i drove it like i stole it before and after. i have no idea what stage 1 and 2 do:D i plan on getting a bigger "chip", i did not buy for milage. i think my tiny 215 dually tires drag my mpg down:(

Hey jumper...I'm assuming you like stage 1 better than 2 on your hypertech? & you get better mpg on stage 1? I'm running on 2 now...but depending on your experience , i may need to try stage 1
I like stage 1 better only when I'm cheap and wanting to get good mpg's. I do like stage 2 when I want to whoop some but):h. Or just have a good time!

BTW, I did not like stage 3, it by far had the most power, but it slipped the tran when not in t/h mode. So one could not help think it would be bad in over-drive/fifth gear. Perhaps that was a learning mode for the tran, but since I'm not in the budget for racing and upgrading the tran, now or later...stage 1 or 2 for me.

As stated, I way---do like the chip!

It just does not make sense to me everyone wants to buy them to get better fuel mileage. I think most must think they do because the chip throws the DIC off by 2-3 miles per gallon (doesnt seem to effect speedometer) and they don't hand calculate to verify mileage.

Enjoy,

i like mine bought for up in tire size of 1-1/2 over stock, took road trip got 19-20 and 1-2 increase in town, but do have a tendency to take off quicker to show off which eats mpg. when i was in hs payday week burn tank in weekend next tank could make last longer, its how you drive

i have a hypertech only reason i bought it was to adjust the speedo. But i decided to use the stage 2. I saw a good diffrence in gas mileage about a 50 miles per tank diffrence with and without and even better on highway. But i changed back to stock because of rumors of long term effect and have noticed a diffrence. I'm gettin exhaust soon so might turn stage one on. till i get an edge.

What rumors did you hear about long term effect?

Dont be skeered! Especially of power. ):h

Well starting with the power i love it. About the rumors on another site is it helps in causing the injector problem because it bumps up the fuel pressure. I dunno about it i've only heard about it once or twice on another forum. i asked a friend of my who is a gm tech and he said that they can withstand alot of fuel pressure but i dunno. I'll be puttin the tuning back on when my turbo-back exhaust comes in. If anyone else has heard this let me know. Rumors are rumors. The good things out weight the bad things Cuz with the injector problems the lb7's have it's a no win situation. And another thing you might thing all the programmers and chips out now do the same thing but the edge doesn't change fuel pressure like the others. it changes fuel pulse. and i do not regret buying the hypertech it helps with trans shifts when you go to 285's. And adjusts the speedo.