6.2 what kind of mpg are you getting?

[D_R_C]

What plastic piece are you talking about? The engine cover?

YES,
On my Dmax it was easy right in front of your eyes, I have not found a bolt/torque screw to remove on my 07 6.2 to remove the engine cover.
Like I said one person said on the Catchcan thread to just jerk it off, I might be a Redneck but I'm not stupid enough to just jerk something off without knowing where its attached.

 

[THE YETI]

As far as mileage on my Denali 6.2 stock 12.8-14.0 with EFI 12.8-13.3 both city/little highway

Dan... how did your MPGs go down lower with EFI on highway?
(looking into that cover issue for ya, i think they might be held in by retention clips)

Smokeymance might know, he pulled his off when he did his TVS2300 install.

 

[JennaBear]

1. Remove the engine oil fill cap

2. Lift the engine cover to disengage two front attachment points.

3. Pull engine cover forward to disengage from horizontal rear attachments.

4. Reverse Steps 1 through 3 to reinstall engine cover.

Sent from an ice cream sammich.

 

[D_R_C]

Dan... how did your MPGs go down lower with EFI on highway?

I wish I knew, I do have plenty of power and driving very easy.
This is my 5th vehicle I've tuned with tuners since 2003 and NOT one of them got the mileage gains claimed. The most I've seen is 0.5 mpg increase on my ex 03 Ford 6.0 diesel.
Even my Dmax actually lost about .5-1.0 compared to when it was stock.
Crap I'm 60 and I'm not driving crazy, I've just been involved in performance vehicles my whole life

(looking into that cover issue for ya, i think they might be held in by retention clips)

Smokeymance might know, he pulled his off when he did his TVS2300 install.

I would appreciate info on removing the top cover so far no one else has coughed up any reasonable info.

---------- Post added at 05:22 PM ---------- Previous post was at 05:20 PM ----------

Unscrew and remove oil cap. Pull cover forward to release front two clips and push back to release back two.

Sent from an ice cream sammich.

Ok, thanks I'll check that out.
This is a much better explanation than what I've been getting.

 

[JennaBear]

Edited for more info. This can also be found in your Owner Manual and online.

---------- Post added at 08:26 PM ---------- Previous post was at 08:24 PM ----------

I would appreciate info on removing the top cover so far no one else has coughed up any reasonable info.

---------- Post added at 05:22 PM ---------- Previous post was at 05:20 PM ----------



Ok, thanks I'll check that out.
This is a much better explanation than what I've been getting.

LOL- I had no clue you were talking about the engine cover!

 

[D_R_C]

Edited for more info. This can also be found in your Owner Manual and online.

---------- Post added at 08:26 PM ---------- Previous post was at 08:24 PM ----------



LOL- I had no clue you were talking about the engine cover!

I never thought about looking in the owners manual
But I have search several ways online and only came up with a 6.0 grab ahold of the top cover and yank it up. This I was not going to do.

Thanks again,
Dan

 

[Speck]

In reply to the op's original question on mileage...

I'm at 60k miles on my 08 Denali with awd. I average around 13.2 all city, 16.4 mixed, and if I'm just taking it easy on the freeway I'm between 18 and 22mpg depending on traffic and speed. Don't know if that helps or not. Best of luck with your project. For comparison sake, I am currently bone stock... for now. Hope to have HP adders and mileage robbers here in the future...

 

[08grey]

I am still getting 8-9 city 12-14 highway. The bbt did make the truck a little better. The air intake I believe is my main culprit of lost mpg.

 

[D_R_C]

The main reason I went with EFI was the inconsistent trans shifting, plus my 6.2 was a dog.
EFI took care of that along with having a little more power, then with my DIY CAI stock air box mod I have plenty of power now.
http://www.tahoeyukonforum.com/forum/showthread.php?t=49875
I did the air box mod before I got EFI and there was a very noticeable difference having more power.
As far as mileage goes I have not gain anything.

 

[One54ton]

I am still getting 8-9 city 12-14 highway. The bbt did make the truck a little better. The air intake I believe is my main culprit of lost mpg.

How much did the black bear tune run you? Thinking about getting one this summer.

 

[JennaBear]

Send a new log to Justin, he may be able to diagnose any mechanical problems. Otherwise, might just be your driving style.

Sent from an ice cream sammich.

 

[joshuaryan]

In reply to the op's original question on mileage...

I'm at 60k miles on my 08 Denali with awd. I average around 13.2 all city, 16.4 mixed, and if I'm just taking it easy on the freeway I'm between 18 and 22mpg depending on traffic and speed. Don't know if that helps or not. Best of luck with your project. For comparison sake, I am currently bone stock... for now. Hope to have HP adders and mileage robbers here in the future...

I get similar results as well. Slightly worse on e-85 but that is to be expected and I only run it when the price margin is greater than 30%.

 

[scottg918514]

In reply to the op's original question on mileage...

I'm at 60k miles on my 08 Denali with awd. I average around 13.2 all city, 16.4 mixed, and if I'm just taking it easy on the freeway I'm between 18 and 22mpg depending on traffic and speed. Don't know if that helps or not. Best of luck with your project. For comparison sake, I am currently bone stock... for now. Hope to have HP adders and mileage robbers here in the future...

This

63k on 2007. 13.3 now mix, plus some towing miles.

 

[JennaBear]

OP- any update on MPGs, now that the superchip issue was sorted out? We have had a few other folks who had previously had handhelds on their vehicles, that also caused the same problems you had.

Sent from a jelly bean.

 

[08grey]

Justin got the superchip issues with the sloppy shifting worked out and sent me a new Tcm tune. It was fine for a while now i don't like how it shifts on light pedal acceleration. Sometimes it's smooth sometimes it bangs into gear. Only on 2nd to third. I guess it learned me getting on it and doesn't like light to light traffic. I did end up getting up to 10 mpg ( so 2 mpg increase ) after last tune. I still need to dial in the Tcm. I am currently running the sport tune with no torque management because I don't like the other. Just haven't had the time to reach out to Justin.

So overall yes it's possible to get better mpg on your 6.2 with a bbt and still have a much faster responsive truck.

If you have had a handheld tune prior make sure you let Justin know several times so he does not miss giving you the reset procedure. He is a busy guy.

 

[livingez_123]

I think someone just needs to learn how to drive all over again. getting good fuel economy is more than driving cautiously, it's about how consistently. it's how you take off from the light, how you get up to speed, how you slow down and how fast you drive. anything over 60 mph and you mileage will suffer. I see a lot of you guys live in Texas and I don't see how you get anything for MPG on the interstate. I started driving in 1976 and gas was cheap then. I didn't care what my car got for MPG, it was a hot rod and I drove it accordingly. Then fuel prices started to climb and I started to change my setup. cam was changed, intake and carb was changed, tuned it differently and ended up with a happy medium. As I got older I had my Daily Driver and I had my hot rod so fuel economy wasn't a big deal anymore. later in life I had my dedicated track day car and my daily Driver was still there to get things moved from point A to point B. Yes I drive different now, fuel is a big expense that I need to get every mpg out of. so a little self discipline goes a long way to getting better MPG. If your getting 11-12 in town and 17-19 on the interstate, call it good and just enjoy the truck for it is. if you really need to get better MPG for commuting by a VW diesel or a chevy Volt or even the new Tesla S. Just get to a happy point with your 08 and drive it. If you cant get happy with it buy something you can be happy with.

 

[NaomiSays]

What are your fuel trims and WOT AFR? Sounds like the tune probably needs a little adjusting. Cleaning the top end definitely wont hurt either.

 

[MABX13]

Thats horrible gas mileage . id rather be driving a hummer with those numbers

 

[ChickenForker]

2013 with 305/55/22's and seem to average in the 11/12's around town and 16ish on the highway. But only have about 3k miles on her, so not sure if she's broke in yet!

 

[scottg918514]

I'm seeing 14 around town and close to 17 on the road....

This


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