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Oil Consumption

waltman

By waltman
in 6.6L Gas V8 (L8T)

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Pryme Senior Enthusiast

Pryme

Posted
Posted
20 minutes ago, waltman said:

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.

What did you get to replace it

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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

waltman Enthusiast

waltman

Posted
  • Author
Posted
11 hours ago, Pryme said:

What did you get to replace it

As Ry Guy says, it is a 22 2500 Custom with the 6.6 diesel. So far I'm very happy with it, lots of power and good on fuel.

  • 7 months later...
Tim Sullivan New Member

Tim Sullivan

Posted
Posted (edited)

Yes sir, My truck burns approximately 1qt/1000 miles, has been to the dealership multiple times since I got it 2 years ago. GM says it’s normal. They did replace the seals last time it was in but won’t go beyond that. It’s pretty frustrating! I’ve also already replaced a transfer case and a transmission as well. Get the duramax and you will be money ahead. 

Edited by Tim Sullivan
  • 3 weeks later...
waltman Enthusiast

waltman

Posted
  • Author
Posted
On 7/14/2023 at 11:20 PM, Pryme said:

What did you get to replace it

I went with basically the same thing with the diesel engine, a 22 Chev Custom 2500HD.

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  • 3 weeks later...
64BAwagon Senior Enthusiast

64BAwagon

Posted
Posted

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) not very dirty at about 40% oil life. the truck now has 5000 miles on it with the first oil change at around 600 miles. My 2021 was similar pulling the same load and trailer but with the 6 spd. 

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MORSNO Enthusiast

MORSNO

Posted
Posted
2 hours ago, 64BAwagon said:

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) not very dirty at about 40% oil life. the truck now has 5000 miles on it with the first oil change at around 600 miles. My 2021 was similar pulling the same load and trailer but with the 6 spd. 

 

That's good to hear, all this chatter about quarts of oil being burned are making me keep my 6.0 with 6 speed a little longer.  My 2012 will be twelve years old on April 13th and only has just under 70,000 miles so keeping it until this oil burning issue with the 6.6 is figured out shouldn't be a problem.   

64BAwagon Senior Enthusiast

64BAwagon

Posted
Posted

I dont know the numbers or the circumstances on the ones that are using oil. I do know that other GM engines I have had my hands on have greatly reduced consumption just by changing brands of oil. I dont have any evidence but my WAG would be the additive pack may have been better suited to the vehicle with the new oil. 

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  • 1 month later...
Green Giant New Member

Green Giant

Posted
Posted

I have been seening that there are several videos and posts regarding oil consumption in the L8T, and many posts also refuting it.  Could be spotty cases.  But one thing to remind folks is that the manual states very clearly to wait overnight to check oil, or at least 2 hrs.  I check mine after overnight exclusively, and find maybe 1/8 qt consumption every 4000 mi, towing or not towing.  Very low consumption.

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  • 3 weeks later...
BCGM Enthusiast

BCGM

Posted
Posted
On 5/13/2024 at 1:16 PM, Green Giant said:

I have been seening that there are several videos and posts regarding oil consumption in the L8T, and many posts also refuting it.  Could be spotty cases.  But one thing to remind folks is that the manual states very clearly to wait overnight to check oil, or at least 2 hrs.  I check mine after overnight exclusively, and find maybe 1/8 qt consumption every 4000 mi, towing or not towing.  Very low consumption.

I was just going to ask about best practice for checking oil and Voila your post came up . So Thank You !

  • 7 months later...
Truston Gunter Enthusiast

Truston Gunter

Posted
Posted

welcome to the club! Mine likes to consume oil! Seems to only happen under heavy loads. My camper isn't really heavy but it does catch alot of wind making the engine work at highway speeds. Just add when low and keep driving! Not much else I can do at this point. 

Ben Jardine Enthusiast

Ben Jardine

Posted
Posted

My 2024 2500 gasser burnt oil like crazy for the frist 25000km . All of a sudden it stoped . I currently have 42 000 on the truck and no more issues . I also change my oil every 7500 km 

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