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6.0 engine questions...

hookem_9

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hookem_9 Enthusiast

hookem_9

Posted
Posted

I'm shopping for a new truck and considering the 6.0. I currently have a 02 6.0, which knocks of course, but has caused me no troubles. Is the NEW 6.0 "04-05" improved over the earlier 99--02 design? no knock? smoother? fuel economy any better? any other benefits???

Thanks,

jeb Enthusiast

jeb

Posted
Posted

My 04 6.0 has no knocks at 9k miles. It's a very smooth motor but it is thirsty. This is in a Yukon XL 2500 so it's the 335hp HO 4.10 version.

taco Enthusiast

taco

Posted
Posted

My 6.0 is quite (no knocks) - MPG is 13 overall --- Thinking about getting a tune for milage.l

Frank S Senior Enthusiast

Frank S

Posted
Posted

My '04 does not have any knock at 11months of use and just under 11k miles. I do have a little valve train noise but it's quiet other than that.

tomm Enthusiast

tomm

Posted
Posted

My 2004 2500hd 6.0 auto with 9k has no knock and gets 11.5 to 13.5 mpg in the winter with very little highway driving .

BADGERMAN Enthusiast

BADGERMAN

Posted
Posted

I have a 2003 6.0L (no knocks) Great motor, runs smooth, does get a little thirsty,

But I think it is because I have a 50lb foot. :cry:

 

I have never had any problems with the motor.

 

Since I have bought the truck, I have averaged about 11.8 mpg.

MrQuadrasteer Senior Enthusiast

MrQuadrasteer

Posted
Posted

Mine's always been a little cantankerous is the morning, but never too loud or bad. More valvetrain than CSK. I have heard csk a couple times, never really knew why sometimes and not others, but really rare. I ain't complainin' !!!

 

It really quieted down a lot when I changed to Mobil1. I highly recommend it :cry:

 

Forgot to mention, y'all getting these low number mpgs, get a Wester tune. I got a 3mpg bump. I'm up to mid-14's mixed driving. And I have a pretty heavy foot myself, can't drive below 70mph....

vhato Enthusiast

vhato

Posted
Posted

'04 Vortec 6000,

Sounds like a newer Diesel if the engine temp is below 150 degrees....and I use Mobil 1 Synthetic.

 

Average Weekend mileage is 13.3 MPG in a VERY busy city. Work commute is 15.1 MPG if I don't break 65 MPH for the tank and 14.5 MPG if I do nail 70 MPH.

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