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Diesel Engine MPG question... i know im going to catch hell for this

Posted on 5/8/13 at 8:07 pm
Posted by Wooly
Member since Feb 2012
13851 posts
Posted on 5/8/13 at 8:07 pm
ok, so i know a few people with gmc 2500 diesel trucks, what i didnt know up until about a year ago is that you can basically put in a chip that will almost double your gas mileage. (thats what he told me, please let me know if their is way more to it) so anyways, he had a 2500 diesel getting around 29mpg. now i know you can get this out of a truck, which is great. but here is my question, which i know im going to catch hell for.

can you do the same type of improvements on a VW Toureg TDI? i know it would obviously void the warranty on a new one, but say on a 2012 that someone buys off the lot from a lease. could it be done?


i have prepared the anus


something to make the toureg more manly
Posted by Nodust
Member since Aug 2010
22643 posts
Posted on 5/8/13 at 8:08 pm to
quote:

, he had a 2500 diesel getting around 29mpg

I'm calling bull shite.
Posted by 4X4DEMON
NWLA
Member since Dec 2007
11957 posts
Posted on 5/8/13 at 8:10 pm to
You drive a vw!? BOO THIS MAN!!!!!@!@ ok now that that is out of the way, yea you should be able to do that, but it may not help much since they're already pretty good on mpg.
Posted by NASA_ISS_Tiger
Huntsville, Al via Sulphur, LA
Member since Sep 2005
8001 posts
Posted on 5/8/13 at 8:14 pm to
I drive a 2003 GMC Duramx and routinely get 20-21mpg. Got a programmer that my dad used on the truck and set to highway mode (vs pulling mode).

It's actually a bitch with all 80 gallons on board (25 stock tank+55 gall aux tool/fuel)...That's 1600 miles...and I only take piss breaks and leg stretches.
Posted by Nodust
Member since Aug 2010
22643 posts
Posted on 5/8/13 at 8:15 pm to
Posted by Carson123987
Middle Court at the Rec
Member since Jul 2011
66519 posts
Posted on 5/8/13 at 8:18 pm to
quote:

you can basically put in a chip that will almost double your gas mileage.


not true. for diesels, a lot of chips can bump your HP up by ~100, but you won't get double gas mileage. Everyone would buy one
Posted by MrCoachKlein
Member since Sep 2010
10304 posts
Posted on 5/8/13 at 8:19 pm to
To get milage like that I think you need a tuner, DPF delete, and an EGR blocker/different exhaust. I'm not the person to ask though
Posted by wickowick
Head of Island
Member since Dec 2006
45848 posts
Posted on 5/8/13 at 8:21 pm to
I have a VW Pasat, diesel and get 46...
Posted by Hammertime
Will trade dowsing rod for titties
Member since Jan 2012
43030 posts
Posted on 5/8/13 at 10:07 pm to
I get 25 in my F250. Just had another fricked up motor though.

I don't think there are chips for VW stuff, and even if, you'd have to straight pipe it to see any gains
Posted by fisherbm1112
Baton Rouge
Member since Jan 2010
6567 posts
Posted on 5/9/13 at 6:34 am to
He is probably lying. My truck was getting 21 when I still had regular rims and tires. That was with an intake and close to straight pipe exhaust. I didn't chip it until after I lifted it. Now I get 14-15-16 on interstate but I get it whether I have a load or not. I am willing to bet he has more than a chip if he is getting mileage like that.
Posted by KG6
Member since Aug 2009
10920 posts
Posted on 5/9/13 at 6:47 am to
Big diesels on trucks leave a lot to be tinkered with. I would not mess with a VW's program. They engineer those things to much tighter tolerances. Plus they're already programmer for milage and not power like trucks are. You'll also get better than advertised. My wife has a tdi jetta and averages 39-40 mpg and her commute isnt really hwy miles.
Posted by DownshiftAndFloorIt
Here
Member since Jan 2011
66763 posts
Posted on 5/9/13 at 8:17 am to
It would probably explode.

Still halfway looking into them, but I'm pretty terrified of VW maintenance costs. My mom had a passat years ago. It was awesome until it hit 100k and then it started doing lots of very bad things, like eating engines.
Posted by HeadSlash
TEAM LIVE BADASS - St. GEORGE
Member since Aug 2006
50127 posts
Posted on 5/9/13 at 11:54 am to
quote:

something to make the toureg more manly


Posted by bayoudude
Member since Dec 2007
25000 posts
Posted on 5/9/13 at 4:21 pm to
Maybe 18mpg at best on a 2500Hd with a chip and dpf delete. My 08 only got around 12 around town and 15 on the interstate. My new 2012 ford with urea injection gets 14-15 around town and 18-20 on the interstate. Definitely bullshite on the 29mpg
Posted by willeaux
Member since Jan 2006
2927 posts
Posted on 5/11/13 at 11:24 am to
I've got a mini max chip in my f250. It increased highway mpg by about 4.
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