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Oil Consumption

waltman

By waltman
in 6.6L Gas V8 (L8T)

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Jettech1 Senior Enthusiast

Jettech1

Posted
Posted
59 minutes ago, Grumpy Bear said:

Sliding vane pumps make noise. :(

I know I know.  The only piece of the puzzle I'm missing is why it didn't make a peep before my first oil change?  That's what bothers me.  I'm trying so hard to figure that out and I keep coming up with nothing.

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64BAwagon
64BAwagon

I just got back from an extended trip. 4000 total miles with almost 3000 of that including 13,000 lbs of trailer and gear. The disptick still shows full and the oil is visually (not that it means much

KARNUT
KARNUT

Over the years I resist checking oil on trips or different locations. Like gas stations. If I do unless it’s over a qt low ( which is never) I call it good. The last time I forgot my own advice I drov

Another JR
Another JR

I suspect all these trucks have similar oil pump noise on start up. Some people are aware of it, and others aren’t. If you start it in a garage or other enclosure you definitely hear it more. I doubt

diyer2 Senior Enthusiast

diyer2

Posted
Posted

How much does this noise bother you?

Switching to a 100% synthetic oil like Amsoil or Redline would make it quieter IMO. 

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Another JR Senior Enthusiast

Another JR

Posted
Posted
14 hours ago, Jettech1 said:

I know I know.  The only piece of the puzzle I'm missing is why it didn't make a peep before my first oil change?  That's what bothers me.  I'm trying so hard to figure that out and I keep coming up with nothing.

It may be that a pressure-filling system of some kind they use at the factory clears a bubble that aggravates the drainback characteristic once you do a drain and gravity fill.  There’s not much we can do as diy maintainers other than pre-filling the filter when you replace it. Slight differences in viscosity aren’t likely to eliminate the issue. I don’t think this needs to be your primary selection criterion for the oil you use. 

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Pryme Senior Enthusiast

Pryme

Posted
Posted
10 hours ago, Another JR said:

It may be that a pressure-filling system of some kind they use at the factory clears a bubble that aggravates the drainback characteristic once you do a drain and gravity fill.  There’s not much we can do as diy maintainers other than pre-filling the filter when you replace it. Slight differences in viscosity aren’t likely to eliminate the issue. I don’t think this needs to be your primary selection criterion for the oil you use. 

It’s very easy to pre fill the filter on this truck. I filled mine about half way before screwing it’s back in. Can’t hurt. 
 

the manual for our kohler powered mower specifically says to pre fill the oil filter. 

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the8rotor Enthusiast

the8rotor

Posted
Posted

4200 HARD miles on my 2024 and zero consumption. I check every week or so and nada.

 

Also had over 32k on my 2021 6.6 and zero consumption. Harsh towing for those miles as well.

John Rommelt Enthusiast

John Rommelt

Posted
Posted
21 hours ago, the8rotor said:

4200 HARD miles on my 2024 and zero consumption. I check every week or so and nada.

 

Also had over 32k on my 2021 6.6 and zero consumption. Harsh towing for those miles as well.

Excellent, Thank you

John Rommelt Enthusiast

John Rommelt

Posted
Posted (edited)
30 minutes ago, Jettech1 said:

I read that article not too long ago.  I think it's very cool although there is no way in hell I would pay the premium for one.  But it is very cool!!

CORRECT! (Super Charger) Ouch $

Trifecta has been working on Cracking ECU and HP Tuners I think is working with Trifecta Performance.

I Can see Tuning Doable, and Exhaust.

Edited by John Rommelt
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Dustin Marshall Enthusiast

Dustin Marshall

Posted
Posted

Back on topic.

 

2024 GMC 2500HD AT4 w/ 6.6L L8T.  Only 4300 miles, so still early...so far I'm happy to report no oil consumption.  Really enjoying the L8T w/ 10 speed 'Allison'.  Nice smooth and refined drivetrain.  Definitely quieter, smoother with more refined shifts vs the Ford 7.3L w/ 10R140 (I've owned both).

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waltman Enthusiast

waltman

Posted
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Posted

I have since traded the truck in I originally started this thread about but I'm convinced it was probably something like the PCV system acting up because it was only going through oil for about a month and then it stopped and never came back.

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