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Go Back   Chevy and GMC Duramax Diesel Forum > Chevy / GMC Duramax 04.5-05 LLY Forum > 04.5-05 LLY Performance Parts Discussion
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04.5-05 LLY Performance Parts Discussion Discussion of Performance Parts For the 04.5-05 LLY Duramax Trucks No Advertising

 
       

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Old 10-20-2009, 07:38 AM   eBay Motors   #1 (permalink)
bamaduramax
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Fuel Mileage

Ok well I have a 2005 lly with nothing but a resognator plug, exhaust without the muffler, and my ppe set on level 4..What are some things I can do to get some BETTER gas milage cause it is killing me to fill this thing up so often?
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Old 10-20-2009, 08:03 AM   eBay Motors   #2 (permalink)
RedBowTies88
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ditch the cat and block the egr and do something about the tiny turbo mouthpiece
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LLY Cc/sb 4x4 RED

Quote:
Originally Posted by Sean S
right they just show n' shine aint spoolin that turbine
Quote:
Originally Posted by McRat
I think the Cummins guys are already datalogging in a very sophisticated manner:

"Heck Bubba, they ain't much smoke, I still sees the sun!"

"You right Jimbo, needs some of them .090" x 6 sticks prolly."
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Old 10-20-2009, 08:12 AM   eBay Motors   #3 (permalink)
DMAXchris
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No gas in these trucks.

You want better fuel mileage, get rid of the tuner and huge tires.
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Old 10-20-2009, 08:23 AM   eBay Motors   #4 (permalink)
RedBowTies88
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Quote:
Originally Posted by bamaduramax View Post
Ok well I have a 2005 lly with nothing but a resognator plug, exhaust without the muffler, and my ppe set on level 4..What are some things I can do to get some BETTER gas milage cause it is killing me to fill this thing up so often?
btw what kinda mileage are you getting that you're considering bad?
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I'm Beech (yep real first name)

LLY Cc/sb 4x4 RED

Quote:
Originally Posted by Sean S
right they just show n' shine aint spoolin that turbine
Quote:
Originally Posted by McRat
I think the Cummins guys are already datalogging in a very sophisticated manner:

"Heck Bubba, they ain't much smoke, I still sees the sun!"

"You right Jimbo, needs some of them .090" x 6 sticks prolly."
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Old 10-20-2009, 08:25 AM   eBay Motors   #5 (permalink)
BurntOrngeLonghorn84
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Quote:
Originally Posted by DMAXchris View Post
get rid of the tuner and huge tires.
x2...or regear to a near stock ratio.
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Old 10-20-2009, 08:26 AM   eBay Motors   #6 (permalink)
DuraTitus
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Quote:
Originally Posted by RedBowTies88 View Post
btw what kinda mileage are you getting that you're considering bad?
^^^Yes what are you getting?
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Old 10-20-2009, 08:29 AM   eBay Motors   #7 (permalink)
darkcherry08
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Try Amsoil..I did and picked up about 2 miles per gallon. What kind of milage are you getting?
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Old 10-20-2009, 08:32 AM   eBay Motors   #8 (permalink)
RedBowTies88
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Quote:
Originally Posted by BurntOrngeLonghorn84 View Post
x2...or regear to a near stock ratio.
believe it or not guys, with the 5 speed the big tires dont hurt the mileage specially on the highway...dont forget with stock tires doing 75 mph we're turning darn close to 2500rpm


i didnt see and mileage increase at all going from 315's to 265's if anything i lost a little bit
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I'm Beech (yep real first name)

LLY Cc/sb 4x4 RED

Quote:
Originally Posted by Sean S
right they just show n' shine aint spoolin that turbine
Quote:
Originally Posted by McRat
I think the Cummins guys are already datalogging in a very sophisticated manner:

"Heck Bubba, they ain't much smoke, I still sees the sun!"

"You right Jimbo, needs some of them .090" x 6 sticks prolly."
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Old 10-20-2009, 08:32 AM   eBay Motors   #9 (permalink)
bamaduramax
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Around 14.2 but whenever my stepdad had the same truck(this actual one) he said he was getting around 16-17 which is about 400 miles to the tank and im getting like 330 to the tank
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2005 ....GMC 2500 hd crew cab
Ready lift leveling kit
315 km2's
Weather Guard toolbox and bedcaps
Light Bar lined with Warns
PPE hot+2
EGR Blocker Plate
Cobalt Pyro and Boost gauges

http://www.huskerdiesel.com”/
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Old 10-20-2009, 08:36 AM   eBay Motors   #10 (permalink)
RedBowTies88
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Quote:
Originally Posted by bamaduramax View Post
Around 14.2 but whenever my stepdad had the same truck(this actual one) he said he was getting around 16-17 which is about 400 miles to the tank and im getting like 330 to the tank
dont forget you only have a 26 gallon tank...and when it gets to e you still have like 5 gallons left.


but 14 is still pretty low....this is unloaded mpg right? when i wa son tires that big i was seeing 19-20highway believe it or not and 17-18ish around town...

i would do the things i said in the first post i made that should help...and its all pretty cheap and will make your truck run better...

also dont forget to keep an eye on your air filter
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I'm Beech (yep real first name)

LLY Cc/sb 4x4 RED

Quote:
Originally Posted by Sean S
right they just show n' shine aint spoolin that turbine
Quote:
Originally Posted by McRat
I think the Cummins guys are already datalogging in a very sophisticated manner:

"Heck Bubba, they ain't much smoke, I still sees the sun!"

"You right Jimbo, needs some of them .090" x 6 sticks prolly."
RedBowTies88 is offline   Reply With Quote
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