Which oil would you choose? Seeing specs only

[DGW444]

rotella 0w40

What is this unicorn you speak of?I have never seen Rotella 0w-40 in the wild...only the tried and true 5w-40 variety.

 

[DGW444]

For what it is worth, my strategy with my 3.0 Duramax is 5w-40 Delvac ESP (chemistry is understood to be the same as dexosD) with fuel treatment of Power Service DPF Flush and Diesel Kleen at recommended treat rates. My 3.0 no longer burns oil since ~20k miles and the DPF Flush fuel treatment should keep the DPF clean even if higher SAPS is a factor in the HDEO. used oil analysis are consistently showing higher than desired wear metals on 0w-20 dexosD and I plan to keep my truck 10+ years. Shooting for highest mileage I can attain. I understand many trade vehicles every 3-5 years so in that case there is no need to worry about 0w-20 because the motor will live 100-150k no issue. In my mind that is not a high bar to achieve.

 

[DGW444]

Here is my used oil analysis for Mobil Delvac ESP 5w-40. 2023 Chevrolet 1500 LTZ Z71 3.0 Duramax. 50k miles on the truck. I have used Mobil 1 Dexos D 0w20 up to this OCI.

 

[userfriendly]

What is this unicorn you speak of?I have never seen Rotella 0w-40 in the wild...only the tried and true 5w-40 variety.

Canadian Tire has T6 0W40. I have about 3L left from a pail I bought in 2019.

 

[oil pan 4]

Safetykleen

 

[UNC006]

Which of these oils would you guys choose based on these specifications alone? For reference I have a ‘23 half ton with the little 3.0 duramax. I’m going to be taking 7 hour trip pulling a smallish camper (well within towing limits with camper, family, and all our gear) through the hills and curves of Missouri. Ambient temps will be mid 90s and humidity will be all of it. Looking for the best protection I can get beings these trucks aren’t scared to see 260° oil temps. For some back ground on the truck, I bought it brand new and dumped the factory fill at 800 miles and put in a 30 weight oil and did oil samples my next two changes. They looked good after break in washed out. I change oil every 5k, fuel at 10k and all drivetrain fluids at 50k. Truck currently has 50k on the clock, I am also currently using in of the oils I’m going to list. Left out name brands on purpose and I’m sure there’s info I missed that I should have included.


CST at 40 - 72.3 - 94.5 - 71.7 - 67

CST at 100- 12 - 15.4 - 12.2 - 11.9

Viscosity idex- 162 - 173 - 169 - 175

HTHS- 3.5 - 4.3- 3.52- 3.5

Noack- 8.6 - 9.2- 8.3- ??

Sulfated Ash- .91- .99- .8- .8

I’d choose the 3rd one, but most HDEO oils are will prematurely degrade your oil pump’s wet-belt

The darling of BITOG for this LM2/LZO engine seems to be Mobil 1 ESP 0W-30 for it’s higher PAO/Ester content vs ESP 5W-30. However, esters are more polar and known to degrade wet-belts unless specially formulated not to. So, without the DexosD or Ford wet-belt approval on either ESP 0W-30 oil or 5W-30, I’d opt for the 5W-30 because it’s chemical formulation should be safer for the wet-belt by default.

 

[DGW444]

I’d choose the 3rd one, but most HDEO oils are will prematurely degrade your oil pump’s wet-belt

The darling of BITOG for this LM2/LZO engine seems to be Mobil 1 ESP 0W-30 for it’s higher PAO/Ester content vs ESP 5W-30. However, esters are more polar and known to degrade wet-belts unless specially formulated not to. So, without the DexosD or Ford wet-belt approval on either ESP 0W-30 oil or 5W-30, I’d opt for the 5W-30 because it’s chemical formulation should be safer for the wet-belt by default.

Could you please provide information pertaining to the technical reason PAO/Ester would not be safe for the wet oil pump belt? I have never seen this discussed or even brought up. Also, I have received recommendation from a very reliable source that all Mobil ESP line oils use the same chemistry, even ESP Delvac HDEO. Further, I believe it is generally accepted now that higher viscosity is the common factor for improved wear protection in the 3.0 Duramax, not PAO/Ester.