Duramax

Post by **AlisoBob** » October 4th, 2008, 4:39 am

I just drove it home, the mileage readout read this most of the way.... It dropped down in some hills and headwinds.

The hard numbers?

397 miles x 19.9 gallons...

19.94 mpg ( 100% freeway @ 68mph)

How much could a lowered, 2wd, tuned Duramax get?

lewisclan · Post by **lewisclan** » October 4th, 2008, 6:02 am

I wish my truck got that kinda mileage

90cr500guy · Post by **90cr500guy** » October 4th, 2008, 6:30 am

Very cool Bob.
I'm not a diesel guy but I bet there are a few mods that would make the mileage even better.
http://www.gearvendors.com/trucks-towing.html

100hp honda · Post by **100hp honda** » October 4th, 2008, 8:25 am

20mpg is good from a full size truck. the new cummins with stock motor is getting 20mpg also

teemtrubble · Post by **teemtrubble** » October 4th, 2008, 8:28 am

I told you...

Post by **AlisoBob** » October 4th, 2008, 10:26 am

lewisclan wrote:I wish my truck got that kinda mileage

Have Maverick put a tune your truck....

britincali · Post by **britincali** » October 4th, 2008, 10:50 am

I dont think mine has EVER got more than 18

Post by **AlisoBob** » October 4th, 2008, 11:44 am

Yea, but you floor it EVERYWHERE....

britincali · Post by **britincali** » October 4th, 2008, 12:34 pm

On or off baybee, no inbetween

teemtrubble · Post by **teemtrubble** » October 4th, 2008, 12:45 pm

britincali wrote:On or off baybee, no inbetween

Tox said the same thing!

britincali · Post by **britincali** » October 4th, 2008, 12:46 pm

I tought her well

teemtrubble · Post by **teemtrubble** » October 4th, 2008, 1:24 pm

britincali wrote:I tought her well

She didn't say that....

MICK · Post by **MICK** » October 4th, 2008, 3:58 pm

I'm not real familiar with diesels...but is 20mpg really good? I thought they got better mileage than that running such low rpm. My truck gets 20 mpg running 2200rpm @ 70 mph. And my truck is also 2WD...I know it's lifted and shit too

Wind resistance is a bitch for sure. Doing just five more MPH on the freeway costs me 2-3 mpg. 70mph is definately optimum cruising speed for my truck. Bob what's your Duramax turn at freeway speeds? 1200-1500?

Oh duh I just looked at your pic again. Now I'm thinking, how in the hell does your truck turn more rpm at lower speeds than my truck

You must have some really low tow / haul gears in that bad boy

teemtrubble · Post by **teemtrubble** » October 4th, 2008, 4:01 pm

2000

MICK · Post by **MICK** » October 4th, 2008, 4:08 pm

I saw that Mike thanks

That just seems a little odd to me?? I have driven a couple manual trans Ford diesels before and they just idled down the road. I'm looking at Bob's pic and it seems to me he's darn near screaming it's guts out. And only doing 68 mph. I see it's an automatic, I guess GM's transmissions work a lot differently than Fords do huh? It's a diesel, can you gear that sucker up and still pull a good sized load?

ISBB · Post by **ISBB** » October 4th, 2008, 9:37 pm

thats right on par for a dmax.. anywhere from 1800-2k depending if the converter is locked up or not.

quantum500 · Post by **quantum500** » October 4th, 2008, 10:02 pm

MICK wrote:I saw that Mike thanks

That just seems a little odd to me?? I have driven a couple manual trans Ford diesels before and they just idled down the road. I'm looking at Bob's pic and it seems to me he's darn near screaming it's guts out. And only doing 68 mph. I see it's an automatic, I guess GM's transmissions work a lot differently than Fords do huh? It's a diesel, can you gear that sucker up and still pull a good sized load?

The most your gonna gain from gears is about 3mpg 1700 is about as low as you wanna go. A boost gauge is a huge help in getting better economy. If you can keep off the turbo you will see better mileage, its as simple as that.

NightBiker07 · Post by **NightBiker07** » October 5th, 2008, 10:07 pm

our 7.3 Excursion with a few mods pulls 32 MPG FULLY LOADED going on vacation hauling 70 down the Eway. and unloaded, this thing hauls ASS.
you cant beat a diesel!

MICK · Post by **MICK** » October 6th, 2008, 7:09 am

quantum500 wrote:The most your gonna gain from gears is about 3mpg

That's a big difference with today's gas prices!! What I'm paying in premium fuel right now that would save me $14 dollars at the pump...a week. When I went to 4.56s from the OEM 3.92s my hwy miles oddly remained the same but my city mileage went up 2 mpg. My small block V-8 doesn't have the grunt yours do to pull tall gears

hoofarted · Post by **hoofarted** » October 6th, 2008, 7:55 am

NightBiker07 wrote:our 7.3 Excursion with a few mods pulls 32 MPG FULLY LOADED going on vacation hauling 70 down the Eway. and unloaded, this thing hauls ASS.
you cant beat a diesel!

32?!

The overhead lie-o-meter does just that...lie. I have an 03 Excursion 7.3 with lotsa mods and rarely get 25ish hwy doing 70, empty. Towing is more like 15-17 at best - I tow a 28' 10k lb WW. Still waay better than a gasser. Only if those asshats would lower the cost of diesel to below gas where it belongs. Oil below $90/barrel today. WTF?? Gas should be under $3/Gal - what gives? Sorry for the small rant.

britincali · Post by **britincali** » October 6th, 2008, 8:35 am

hoofarted wrote:
NightBiker07 wrote:our 7.3 Excursion with a few mods pulls 32 MPG FULLY LOADED going on vacation hauling 70 down the Eway. and unloaded, this thing hauls ASS.
you cant beat a diesel!
32?!

.

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fastkart · Post by **fastkart** » October 6th, 2008, 8:36 am

hoofarted wrote: Gas should be under $3/Gal

$3.04 in Iowa this past weekend... before the drop in oil.

Post by **AlisoBob** » October 6th, 2008, 8:41 am

britincali wrote:

X193845889034825398802826896

X193845889034825398802826897

britincali · Post by **britincali** » October 6th, 2008, 8:46 am

teemtrubble · Post by **teemtrubble** » October 6th, 2008, 8:54 am

NightBiker07 wrote:our 7.3 Excursion with a few mods pulls 32 MPG FULLY LOADED going on vacation hauling 70 down the Eway. and unloaded, this thing hauls ASS.
you cant beat a diesel!

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