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Add engine oil!!!

Truston Gunter

By Truston Gunter
in 6.6L Gas V8 (L8T)

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Jettech1 Senior Enthusiast

Jettech1

Posted
Posted
12 hours ago, Pryme said:

I have a better story from my youth. I had a 1970 F250 2wd with a 460 C6 combo with a violent shift kit and the engine was bored 10 over. What an animal. This was in 1997. So it was old even then but the engine was fresh. Anyway I didn’t have a grasp on gearing or rev limits etc and was racing my friends Camaro. A 94 catfish and my old horizontal speedometer was pegged past 100 and I never let off and I heard something and when I exited off the freeway it wanted to die I kept having to give it revs to keep it running and I pulled it into the shop I worked at and the mechanics took the valve covers off and low and behold I floated a pushrod right out it was laying on the block. The most amazing thing? It wasn’t bent it didn’t look bent at all it was unreal and we put it back together and it ran fine holy heck. 
 

I bought a cheap little tach after that. 
 

I loved that truck. Key was on the left. Crazy torque 

I love it!!  The things we did back in the day!!  My dad was State Patrol, so it was hard to get away with anything in our little small town.  There was only one golden rule he had....he said, everyone speeds, I don't care about that.  But if you ever drink and drive and I find out, I will arrest you, take you to jail and have them throw away the key....he said boy, they will have to pump sunlight into to your cell...... so....you know what I didn't do.....yup, no drinking and driving.... 😀  He was a very fair man and great dad, no reason to break that golden rule of his.  I still don't to this day!

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Mine burns excessive amounts of gasoline.

diyer2
diyer2

While I have never approached things like an engineer would, I have just kept motors in an as new condition and changed the oil and filters. I do applaud the science part but never used it and never h

MacLaren
MacLaren

Ok fellas, I've got a 2021 Gasser, just took in for an oil change (every 5k) and, they told me she wasn't even low. And, we've been on 5 camping trips during this 5,000 mile stretch. We haul an 11,000

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Jettech1 Senior Enthusiast

Jettech1

Posted
Posted

But here's where he used to just shake his head at me.  Have any of you seen the movie Eat my dust with Ron Howard?  It was quite similar to my life growing up.  It was considered a professional courtesy to not give another cops family a ticket for most anything back in the day.  And I wore that professional courtesy out....lol... I used to keep a paper on my sun visor to mark how many times I had been stopped.  No joke... I finally got an actual ticket on my 18th birthday of which marked the 18th time I had been pulled over.  My mother went ballistic on me.  Dear old dad didn't say much.  Just shook his head and didn't say much.  Funny thing is the trooper that gave me ticket, that I did deserve asked me if I wanted to go riding with him that Friday night....lol....it cost me 25 bucks and an ass chewing from the judge but we all stayed friends.  True story....being the son of a state cop sucked growing up, being beaten up by those bigger guys that were like, your dad stopped my dad, pow....right in the kisser....yeah I had to learn to be a scrapper early on.  But it was fun as hell aside from that.  They all wanted me to become a trooper too.  I knew I didn't have that tolerance for BS they have to put up with, but it was fun as hell riding with them all on the weekends.  The stories I have are amazing!

 

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  • 8 months later...
Antny Enthusiast

Antny

Posted
Posted
On 5/27/2023 at 10:50 AM, MachWun said:

I've read through a lot of this long thread and am feel a lot of dread.  I have a 2020 GMC Sierra 2500 Denali.  The dealer put 6 quarts in the engine at 19,000 and I have since started burning oil.  First time I took it in they checked for leaks (found none) and gave it back saying come back in 1,000 miles.  Of course, once GM got involved, the dealer realized they did not conduct a proper oil consumption test.  I am in the middle of one now and can see a huge shift in 'cover you ***' type of documentation.  Likely because GM has contacted them about it.

 

Read the last order and you can smell the BS. 

  • First return to dealer it was barely on the dipstick.  Added 1.5 quarts (so they claim)
  • Second return is was not on the dipstick.  Added 1 quart.
  • Noted evidence of towing.  **NO STUFF!!  Who drives a 2500 for pleasure?  But I have not towed since early Fall, 1,000's of miles before the last oil change and consumption test.
  • They state on the order that 1 quart per 1,000 miles is acceptable.  Assuming an oil change at 5,000 miles, and I lose 62.5% of my oil??  From driving 60% highway / 40% city?

Note the order has a quantity of 2 for quarts of oil.  Why 2 if they only used 1?

 

I have had 4 Chevy and GMC pickups plus 7 other GM vehicles.  If nothing further is done, I likely need to sell this very expensive truck.  If I do, it will be my very last GM product ever.

 

 

 

20230527_113338.jpg

This is sad to see. I hope this helps you. I talked to a high performance auto tech and it changed the way I look at oil on the market nowadays. Look at this post I made. 

 

  • 4 months later...
Truston Gunter Enthusiast

Truston Gunter

Posted
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Posted

UPDATE: Truck currently at 57,951. No change really, same issue but I firmly believe taking to dealer would have been a total waste of time, even to have it documented since it technically is "within spec". Oil life indicator is currently at 23% and just received an "add engine oil" message. Sure enough dipstick read low and added almost 2 quarts for it to register again. Did some towing the past couple of months and that seems to be the "reason". Crappy MPG's and oil consumption maintaining highway speeds while towing a 7500 lb camper but she still makes it to the destination so can I really complain?   

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lineman1234 Enthusiast

lineman1234

Posted
Posted
1 hour ago, Truston Gunter said:

UPDATE: Truck currently at 57,951. No change really, same issue but I firmly believe taking to dealer would have been a total waste of time, even to have it documented since it technically is "within spec". Oil life indicator is currently at 23% and just received an "add engine oil" message. Sure enough dipstick read low and added almost 2 quarts for it to register again. Did some towing the past couple of months and that seems to be the "reason". Crappy MPG's and oil consumption maintaining highway speeds while towing a 7500 lb camper but she still makes it to the destination so can I really complain?   

Im sure you have, but have you tried a different type of oil, brand? I really dont keep track, but i think im using Quaker state. 

 

My 2024 6.6 gasser 3500. About 24,000 miles on mine now. It uses no noticeable oil usage per oil changes. 

    Currently on this oil, since mid October, i drove around upper MN, towed to Rockport TX about 1,600 miles then 650 to New Mexico then just got back to Rockport 650 hear and no noticeable oil usage. Im towing a 10,000lbs tall 5ver. I think its at 30% left oil life. 

 

 

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mrjulian416 Enthusiast

mrjulian416

Posted
Posted
On 1/6/2025 at 10:52 AM, lineman1234 said:

Im sure you have, but have you tried a different type of oil, brand? I really dont keep track, but i think im using Quaker state. 

 

My 2024 6.6 gasser 3500. About 24,000 miles on mine now. It uses no noticeable oil usage per oil changes. 

    Currently on this oil, since mid October, i drove around upper MN, towed to Rockport TX about 1,600 miles then 650 to New Mexico then just got back to Rockport 650 hear and no noticeable oil usage. Im towing a 10,000lbs tall 5ver. I think its at 30% left oil life. 

 

 

 

What brand and weight are you using?

lineman1234 Enthusiast

lineman1234

Posted
Posted

Whats on sale at NAPA at the time i need oil. As long as it meets vehicle specs im good with any oil. 

  • 2 months later...
MORSNO Enthusiast

MORSNO

Posted
Posted
18 hours ago, lundimpact1775 said:

Just got a "add engine oil" DIC message. 2700 miles since last change, I'm just over 2 full quarts low. Dipstick was dry. 

 

At what truck mileage?

Another JR Senior Enthusiast

Another JR

Posted
Posted

In the “Are L8T engines noisy” thread a few days ago, lundimpact1775 posted:

 

My 2020 L8T Silverado 2500 is noisy at 98k, has been noisy since I bought it at 89k.

johnnyquick Enthusiast

johnnyquick

Posted
Posted
2 hours ago, diyer2 said:

Forgot how to check oil?

obviously you should not need to unless you saw a leak on a newer vehicle like this.

I expect some smart comment but this is not 1978 and this truck should not be using this much oil, THAT is why NHTSB is investigating GM.

HOWEVER I will say that once you realize GM makes crappy A**ed engines that use oil like a 1947 Packard then you should start checking it..lol

Mine WAS drinking oil like crazy until I did a flush and switched my grade to 10-30 as opposed to 0-20w and use only HIGHER quality oil than the idiots at the dealer put in.

Buying another brand next time unless we get the Escalade V with the handbuilt ZR-1 engine.

Cheers

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johnnyquick Enthusiast

johnnyquick

Posted
Posted
On 7/22/2022 at 4:20 PM, MacLaren said:

Ok fellas, I've got a 2021 Gasser, just took in for an oil change (every 5k) and, they told me she wasn't even low. And, we've been on 5 camping trips during this 5,000 mile stretch. We haul an 11,000 pound 5th wheel.  I use Pennzoil Platinum 5w30 & a Napa Gold Filter

Anything above 0-20w likely is the helper in this case, still lucky you I would say

diyer2 Senior Enthusiast

diyer2

Posted
Posted

Obviously you should check your oil but you're smarter than me. 

  • Haha 2
customboss Senior Enthusiast

customboss

Posted
Posted
On 1/7/2025 at 3:36 PM, lineman1234 said:

Whats on sale at NAPA at the time i need oil. As long as it meets vehicle specs im good with any oil. 

NAPA oil = Vavloline and is a good product.

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