Duramax fuel additives?

[Stormin08]

i think were alot of people miss out, is not knowing what the OE is doing behind the scenes...

talking BONE STOCK OE parts...take the 4L60E vs 4L65E trans...the 65 has a 5 roller planetary, the 60 has a 4...which is better ??? to the layman, the 5th bearing should be capable of handling larger loads (hence the 65 rating) of torque....BUT DOES IT, the STOCK pieces are not necessarily better. the OE adds the 5th roller, simply to cut cost elsewhere... be it material, heat treatment, or coatings...

sure, they added the 5th roller, but used an inferior material and a different heat treatment process....

 

[Murph76]

i think were alot of people miss out, is not knowing what the OE is doing behind the scenes...

talking BONE STOCK OE parts...take the 4L60E vs 4L65E trans...the 65 has a 5 roller planetary, the 60 has a 4...which is better ??? to the layman, the 5th bearing should be capable of handling larger loads (hence the 65 rating) of torque....BUT DOES IT, the STOCK pieces are not necessarily better. the OE adds the 5th roller, simply to cut cost elsewhere... be it material, heat treatment, or coatings...

sure, they added the 5th roller, but used an inferior material and a different heat treatment process....

I believe thats what Natedog was saying about 10l80...inferior everything...made to shit out on u right after your 3yrs is up...

 

[RET-G]

Relying for factual info on the internet is like looking for an honest politician. Not going to happen. The 3yr/36K does not include the powertrain....
Great to see what people are doing to their trucks such as add-ons, tires, etc. Not so great for actual info regarding any component across the entire line. Failures happen, but do they happen to all or just a small number. I agree one blown trans is not good but are all or a greater majority going to blow? If they did, pretty sure GM would be in a class action or doing a recall...

As hinted before, I'm moving on......from this thread it went way off course of the OPs original question and I am as responsible as other with the deviation from an answer.

Powertrain Component Coverage
Powertrain components are covered for
5 years or 60,000 miles, whichever comes
first.
Silverado TurboMax™ engines, 3.0L & 6.0L
Duramax® Turbo-Diesel engines, and certain
commercial, government, and qualifying fleet
vehicles are covered for 5 years or 100,000
miles, whichever comes first.

 

[wolverine]

The reason 5w30 oil is seen on a GM-published list of Dexos D oil licenses is because the newer Dexos D spec supersedes Dexos 2. Dexos2 was the previous diesel oil spec specifically for the LWN 2.8L 4-cylinder diesel found in the last generation Colorado/Canyon trucks. The recommended oil viscosity in those engines was 5w30, and that's why that viscosity is seen on a list of Dexos D licensed oils.

As far as I can tell, there are no other recommendations for oil viscosity in the 2025 GM Diesel Supplemental Owner's Manual other than 0w20. And, it doesn't say "recommended". It says "USE SAE 0W-20 VISCOSITY GRADE ENGINE OIL."

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