2024 Silverado 3.0 Duramax, 18.8k mi; 5W-30 Amsoil Diesel Oil 5k mi

[Z28racecar]

Switched from HPLs 0W-20D after less than stellar wear metal totals. Amsoil 5W-30 Diesel Oil showed a very good reduction in wear metals.

Not sure what caused the fuel dilution increase, only thing I can think of is that I use OptiLube XPD every fill up, so I'm going to stop using it as much.

Will be doing another UOA for my next oil change. 0W-20 is definitely not for the babymax.

 

[Klutch9]

Im guessing that the sample of 0w20 from about 8,000-13,000 miles (estimating based on your total mileage so far) still had some break-in going on.

 

[Z28racecar]

Im guessing that the sample of 0w20 from about 8,000-13,000 miles (estimating based on your total mileage so far) still had some break-in going on.

Yeah, my last oil change was at 13,700ish with the HPL

 

[dnewton3]

The HPL was seeing break in.

Can’t fairly compare two UOAs and say one lube was better or worse.

I expect the metals will continue to drop a bit.

Soldier on. And extend those OCIs.

 

[BobsArmory]

I won't bet my pension on it but as I recall I have seen much lower wear metals on these engines using 5w-30 rather than the 0w-20 oils. That said I'm currently running an HPL 5w-30 oil in my baby duramax.

I wouldn't blame XPD on the fuel dilution.

 

[Z28racecar]

I won't bet my pension on it but as I recall I have seen much lower wear metals on these engines using 5w-30 rather than the 0w-20 oils. That said I'm currently running an HPL 5w-30 oil in my baby duramax currently.

I wouldn't blame XPD on the fuel dilution.

I occasionally watch DemonWorks videos on YouTube, and he has a video or two showing various UOAs for the babymax. The UOAs with 5W30 have always been noticeably lower in wear metals than the 0W-20s. The Rotella MV and Amsoil 5W-30 showed some of the lowest from what I saw

Does HPL offer a DexosD package in 5W30 now?

 

[BobsArmory]

Demonworks currently using Pennzoil Euro L in his babyduramax?

 

[6.7 CTD]

I’d run a 5w40 diesel oil in it, especially because of fuel dilution and the fact that oil reaches 230F often in that motor from my understanding.

 

[BobsArmory]

I’d run a 5w40 diesel oil in it, especially because of fuel dilution and the fact that oil reaches 230F often in that motor from my understanding.

From Lake Speed, " I would not recommend jumping from 0W-20 to 5W-40 without used oil analysis to guide the process."

 

[Z28racecar]

I’d run a 5w40 diesel oil in it, especially because of fuel dilution and the fact that oil reaches 230F often in that motor from my understanding.

I wouldn't be opposed to using a 40 grade. I haven't seen anything about the engine temps getting that high, but me being in Texas, I can believe it

 

[6.7 CTD]

From Lake Speed, " I would not recommend jumping from 0W-20 to 5W-40 without used oil analysis to guide the process."

It’s a diesel engine, and it’s suffering from fuel dilution. That engine inherently runs “hot.” I highly doubt jumping from an absurd recommendation of 0w20 to a 5w40 would be an issue. In fact, I would wager it would be a drastic improvement in terms of longevity. I use a 30w in my wife’s car which specs a 16w; no issues regardless of what he says.

 

[6.7 CTD]

I wouldn't be opposed to using a 40 grade. I haven't seen anything about the engine temps getting that high, but me being in Texas, I can believe it

https://www.duramaxforum.com/threads/lm2-engine-oil-temp.1030787/
If you have a chance read this thread. Some guys are seeing 260F oil temps towing 5k at 75mph in 75F weather…

 

[BobsArmory]

It’s a diesel engine, and it’s suffering from fuel dilution. That engine inherently runs “hot.” I highly doubt jumping from an absurd recommendation of 0w20 to a 5w40 would be an issue. In fact, I would wager it would be a drastic improvement in terms of longevity. I use a 30 weight in my wife’s car which specs a 16w; no issues regardless of what he says.

No issue here. I'm just relaying what an educated guy with a degree in tribology stated. If I were the owner of this engine I would be looking into why there is fuel dilution in the first place instead of jumping all the way to a 40w oil. Leaking injector, to much idling etc.

 

[6.7 CTD]

No issue here. I'm just relaying what an educated guy with a degree in tribology stated. If I were the owner of this engine I would be looking into why there is fuel dilution in the first place instead of jumping all the way to a 40w oil. Leaking injector, to much idling etc.

Agree with the fuel dilution aspect. However, I don’t agree with everything the guy says despite his credentials.

 

[fantastic]

Good to note that even with the odd 9+% fuel the wear is still coming down.

 

[Z28racecar]

No issue here. I'm just relaying what an educated guy with a degree in tribology stated. If I were the owner of this engine I would be looking into why there is fuel dilution in the first place instead of jumping all the way to a 40w oil. Leaking injector, to much idling etc.

The most idling I do is a few minutes before before I start my driving in the morning. I'd hope it's not a leaking injector with only 19k miles on my truck, but it's not like GM has had some issues lately.

I emailed LSJ about my fuel dilution issue last night when I saw the report and he told me reduce my fuel additive usage and see what happens on the next UOA.

 

[cookand]

Thanks for the post. I have a ‘21, so the older version of the 3.0. Never run a UOA so I don’t know much other than what I read. Earlier post mentioned running hot, my truck pretty much stays on the 210° unless it’s in regen. Have been considering going to a 30 for quite some time, but makes me anxious

 

[FreedomOne]

Thanks for the post. I have a ‘21, so the older version of the 3.0. Never run a UOA so I don’t know much other than what I read. Earlier post mentioned running hot, my truck pretty much stays on the 210° unless it’s in regen. Have been considering going to a 30 for quite some time, but makes me anxious

If you don't have the updated timing chain you should definitely be running something other than 20wt. A 30wt should have been the factory spec given the chain and temps the engine runs.

 

[cookand]

If you don't have the updated timing chain you should definitely be running something other than 20wt. A 30wt should have been the factory spec given the chain and temps the engine runs.

Appreciate the reply!

 

[cookand]

I wouldn't be opposed to using a 40 grade. I haven't seen anything about the engine temps getting that high, but me being in Texas, I can believe it

Have you considered running esp 0/5w30?