Conventional or full synthetic

[07HD]

 

First oil change coming up way before the computer says to. Just thought I would get thirty different opinions on what's the best oil on the market.

( I have owned diesel trucks for the past 28 years) 

 

2020 SLT 3500 CC. DRW.

[KARNUT]

Really? Conventional. People may not agree on what synthetic to use. The general consensus would be at least a blend.


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[pegasus]

You will probably get more than 30 opinions.  This kind of thread brings out the worst in people.  For what its worth, I use Shell Rotella T6 in my truck, tractor and motorcycle.

[diyer2]

Wouldn't even consider conventional oil.

 

:)

[Grumpy Bear]

12 hours ago, 07HD said:

 

First oil change coming up way before the computer says to. Just thought I would get thirty different opinions on what's the best oil on the market.

( I have owned diesel trucks for the past 28 years) 

 

2020 SLT 3500 CC. DRW.

So, your bored and want to be entertained. 

 

 

Okay, I'll watch.

[AT4 HD Ron]

I ran Rotella T4 in my 2014 and used it on the first oil change of my 2020.  Just bought T6 for the 9K mile oil change - I'm sure T4 would have been fine, just seemed like I should use T6 in this expensive of a truck going forward!

Edited March 24, 2020 by AT4 HD Ron

[Black02Silverado]

Yes, you will get a plethora of choices.  For what is available on the shelf at the part stores, you can't go wrong, especially if you are changing it every 5k.  Going synthetic in a diesel to keep things cool and clean is a better option in my opinion.

 

If you want a quote on a 2.5 gallon jug of AMSOIL's diesel oil, pm me your address and I can get you a quote.

[diyer2]

Amsoil member/ preferred customer diesel oil about $85 for a 2.5 gal. jug.

[garagerog]

Owners manual is your friend, with a very expensive truck if it was me I would stick with a Dexos spec diesel oil to avoid any future warranty hassles.

[redwngr]

1 hour ago, garagerog said:

Owners manual is your friend, with a very expensive truck if it was me I would stick with a Dexos spec diesel oil to avoid any future warranty hassles.

No No No!!! 

Not in a 6.6L

 

 

Dexos is NOT the spec for the 6.6L Duramax!! 

 

2020 Duramax 6.6L supplement calls for 15W40  CJ-4 or CK-4   Manual suggests 5W-40 for long periods of operation belwo 0*F

There are many sources of 15W-40 CJ-4 or CK-4, as that is probably the most common engine oil spec in the diesel world.

 

FWIW,

2020 Duramax 3.0L supplement calls for   0W-20   meeting the Dexos D specification.

 

DexosD approved oils here:https://www.gmdexos.com/brands/dexosd/index.html

(currently there are only 2 on the approved list) 

 

 

Edited March 24, 2020 by redwngr

[migrabill]

I'm going to have my dealer do all of my oil changes. I wonder what they will use?...

[07HD]

Probably stick with Castrol  GTX its worked well for years.

[Grumpy Bear]

C'mon guys. Is this a B movie or what? 

[Grumpy Bear]

On 3/23/2020 at 10:13 PM, 07HD said:

 

First oil change coming up way before the computer says to. Just thought I would get thirty different opinions on what's the best oil on the market.

( I have owned diesel trucks for the past 28 years) 

 

2020 SLT 3500 CC. DRW.

Then you have a system that works. 

 

 

[swathdiver]

My latest Blackstone Labs report.  This is 2nd run of new ACDelco oil, the other two samples are plain old Mobil One.