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

[CleverUserName]

Thinking of going with 0/5w30 ESP. Any opinions on which one? Cold weather is not a concern as I live in Alabama. Both of my other vehicles are using 5w30 ESP

I’ve been saying this for years. I have a 2.8 Duramax and have always used HD 5w40 or 10w40 in it although GM says 5w30 Dexos 2. The iron wear is usually 50% that of trucks using 5w30.

If I had an LZO I’d be running a synthetic SAE 30 or 10w30. Amsoil HD 10w30 or RLI SAE 30 which is also a 10w30. Both handle heat well and have low volatility.

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.

Wasn’t XPD the additive that has iron in it when LSjr tested it in one of his videos? Likely ferrous picrate or another iron based catalyst. I wouldn’t use an additive that has background iron as it makes your iron wear appear higher than it really is.

Excessive DPF regeneration can cause high fuel dilution as well. Maybe worth tracking your frequency.

Mobil branded synergy diesel efficient fuel has additive included at the pump. You can also try a different additive that doesn’t have background iron. MMT is a proven catalyst that is safe for DPFs and background manganese doesn’t mask wear.

 

[BobsArmory]

Wasn’t XPD the additive that has iron in it when LSjr tested it in one of his videos? Likely ferrous picrate or another iron based catalyst. I wouldn’t use an additive that has background iron as it makes your iron wear appear higher than it really is.

No, Archoil had the high iron.

 

[CleverUserName]

No, Archoil had the high iron.

Did you rewatch the video? Didn’t archoil have the background potassium? I don’t have time to rewatch it now.

 

[BobsArmory]

Did you rewatch the video? Didn’t archoil have the background potassium? I don’t have time to rewatch it now.

Hotshots and XPD have some Potassium. The only reason Lake does not care for potassium is because it can show up in a UOA and could possibly mask a coolant leak.

 

[CleverUserName]

Hotshots and XPD have some Potassium. The only reason Lake does not care for potassium is because it can show up in a UOA and could possibly mask a coolant leak.

I understand how background metals can mask wear in UOAs or in this case a coolant leak with potassium.

That is not what I remember. I remember the XPD having some kind of iron catalyst and I commented on the LSjr YouTube video that it was likely ferric picrate.

I remember Archoil fuel additive had potassium which is also found in their oil additive. Not surprising at all.

I’d never use a HSS product and ignore anything posted about HSS. I don’t know why LSjr even included them in the test.

 

[burbguy82]

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.

View attachment 280661

Give the engine a chance to break in before you condemn the oil as the cause.

 

[BobsArmory]

I understand how background metals can mask wear in UOAs or in this case a coolant leak with potassium.

That is not what I remember. I remember the XPD having some kind of iron catalyst and I commented on the LSjr YouTube video that it was likely ferric picrate.

I remember Archoil fuel additive had potassium which is also found in their oil additive. Not surprising at all.

I’d never use a HSS product and ignore anything posted about HSS. I don’t know why LSjr even included them in the test.

You need to watch it again then.

 

[CleverUserName]

You need to watch it again then.

Yeah I do. Sometimes my memory is fuzzy on details. I’ll search YouTube and watch it later tonight.

 

[DGW444]

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.

Do you happen to have oil analysis? I am working on that now. Just sent my first sample with Mobil 1 DexosD to Speed Diagnostics and will run another OCI before switching to Mobil Delvac 5w40.

 

[DGW444]

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

~230°F+/- is normal operating oil temp on these engines. Buy a $20 bluetooth adapter and OBD Fusion app to get all the information you will ever need displayed directly on your dash screen.

 

[6.7 CTD]

Do you happen to have oil analysis? I am working on that now. Just sent my first sample with Mobil 1 DexosD to Speed Diagnostics and will run another OCI before switching to Mobil Delvac 5w40.

I don’t own a truck with this engine. I have a Ram with the 6.7 Cummins. I was simply stating that if I owned one, I would certainly run a viscosity greater than a 20w in it; specifically a 40w.

 

[DGW444]

I don’t own a truck with this engine. I have a Ram with the 6.7 Cummins. I was simply stating that if I owned one, I would certainly run a viscosity greater than a 20w in it; specifically a 40w.

I hope to validate that idea with oil samples over the next 3-5 OCI’s.

 

[dnewton3]

I hope to validate that idea with oil samples over the next 3-5 OCI’s.

A few samples are insufficient to compare/contrast two oils. Any conclusions from such efforts are assured to be erroneous.
What you can do is look at the UOA data and see if it's "normal" or not, relative to macro-data of the general population.

 

[DGW444]

A few samples are insufficient to compare/contrast two oils. Any conclusions from such efforts are assured to be erroneous.
What you can do is look at the UOA data and see if it's "normal" or not, relative to macro-data of the general population.

Thank you for the reminder. I will post the reports as they come in. Also, I am interested in comparing against Wayne's data since his 3.0 Duramax test seems to have gone south.