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1984 cucv Engine oil type 6.2l diesel

CenterMass762

Member
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Location
TN
Yep, the military uses cheap, recycled 15w40. Any store-brand 15w40 will be as good or better than what that truck was fed for most of its life.
 

porkysplace

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mid- michigan
Welcome to Steelsoldiers . Since BKubu answered your question , Here is a link you will want to bookmark .
the CUCV helpful threads link , there is a wealth of knowledge there.

And here are the links to the TM's : https://www.steelsoldiers.com/forums/cucv-tms.114/

Listed below are a number of the TM's for the CUCV trucks. To save them to your computer, right click, select "save as".

LO9-2320-289-12.pdf
LO9-2320-289-12 Lubrication order for all variants of the CUCV. Lube order

TM9-2320-289-10.pdf
TM9-2320-289-10 Operators manual for all variants of the CUCV. This should be read by ALL new CUCV owners

TM9-2320-289-20.pdf
TM9-2320-289-20 Unit maintenance manual for all variants CUCV.

TM9-2320-289-20P.pdf
TM9-2320-289-20P Unit maintenance and depot maintenance parts and special tool lists for CUCV.

TM9-2320-289-34.pdf
TM9-2320-289-34 Intermediate support and Direct Support for all variants CUCV.

TM9-2320-289-34p.pdf
TM9-2320-289-34P Direct support and general support maintenance repair parts and special tools lists.

TM9-2815-237-34.pdf
TM9-2815-237-34 Direct and general support maintenance engine 8 Cyl diesel naturally aspirated water cooled.
 

Barrman

Well-known member
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Location
Giddings, Texas
Rotella 15-w40 is what you will find at Walmart and just about any parts store. If no turbo I would suggest the T4 non synthetic. If you have a turbo or plan to let it sit for months between uses then the T6 synthetic might be better for your engine.

You can use any brand. I just know Rotella is stocked just about everywhere and is meant for diesels. Whatever you get make sure it says heavy duty diesel oil. That is the important walk away from this thread.
 

Huertam96

New member
10
12
3
Location
Houston tx
Rotella 15-w40 is what you will find at Walmart and just about any parts store. If no turbo I would suggest the T4 non synthetic. If you have a turbo or plan to let it sit for months between uses then the T6 synthetic might be better for your engine.

You can use any brand. I just know Rotella is stocked just about everywhere and is meant for diesels. Whatever you get make sure it says heavy duty diesel oil. That is the important walk away from this thread.
Thank you as well this very informative ! Y’all have a blessed day
 

87cr250r

Well-known member
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Location
Rodeo, Ca
On the bottle, look for the API oil category.


In the past, all oils marketed for diesel engines were C category. Typically, any changes superceded previous categories. Recently a F category has been introduced. This is not backwards compatible with the C. In other words, don't run the 10w30 diesel oil in your 6.2/6.5. Everything else will work just fine.
 

Tinstar

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Edmond, Oklahoma
Recommend also using Wix filters.
Just like Oils, there is a difference in quality among the brands.

I use Mobil 1 Motor Oil 10-40w and Wix filters on everything I own.

Everyone has their own personal preference.
 

cucvrus

Well-known member
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Location
Jonestown Pennsylvania
Everybody on here likes to quote technical information. This is from the GM 6.2 manual I have from GM school back in the early 80's.
The GM 6.2 service manual did recommend 10W30 during the winter months. The manual did say to avoid the use of 10W40 engine oil but to retain 15W40/SAE 30 for hot weather use.
I don't know why. I am just copying it from the manual.
I only wanted to put that out there so someone is not misinformed. To each his own. I used 15/50 in a few CUCV's during hard long hauls. My days of hard long hauling in a CUCV are over. I can still hear the Katydids. Have a Great Day. Stay well lubed. I hate a dry crank.
 

87cr250r

Well-known member
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Location
Rodeo, Ca
If you're going to run a 10w30 oil it needs to be an API C oil, not API F. For example, Chevron Delo 400 SDE is ok. Chevron Delo 400 ZFA is not ok.
 

weaponoffreedom

New member
28
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3
Location
NC, USA
Recommend also using Wix filters.
Just like Oils, there is a difference in quality among the brands.

I use Mobil 1 Motor Oil 10-40w and Wix filters on everything I own.

Everyone has their own personal preference.
10w40 standard motor oil? Mobil does not make a 10w40 diesel oil.

Is Mobil 1 10w40 also a C rated oil?

On Mobils site, it does not show a C rating for 10w40


Funny, right on the fill cap, it specifies SF/CC or SF/CD oil. On the visor is states, use an oil that satisfies BOTH SF/CD/CC.

0w40 meets CF and up to SP, (BOTH exceeding the requirements ) just some food for thought.

 
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weaponoffreedom

New member
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13
3
Location
NC, USA
I’d like to know the correct engine oil type. I’d prefer to know what it is or what it’s suppose to be
SF/CC or SF/CD engine oil

They are Obsolete specs, and the oil has not been made for nearly 30 years

Depending on temp, SAE HD 30 is preferred above freezing, which is still made

below freezing, 10w30, 15w40 is spec

Judging by the book, the best oil for this engine would be a 0w40, like M1 0w40, which holds SP and CF ratings, or any other oil that is CK-4 AND SN rated, more modern API listings.
 

Tinstar

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Location
Edmond, Oklahoma
10w40 standard motor oil? Mobil does not make a 10w40 diesel oil.

Is Mobil 1 10w40 also a C rated oil?

On Mobils site, it does not show a C rating for 10w40


Funny, right on the fill cap, it specifies SF/CC or SF/CD oil. On the visor is states, use an oil that satisfies BOTH SF/CD/CC.

0w40 meets CF and up to SP, (BOTH exceeding the requirements ) just some food for thought.

Mobil 1 Delvac
It’s their Diesel oil and there are several different ones to choose from.
Fully Synthetic, Partial (edit: Blended) Synthetic, etc.
 
Last edited:

dr3d

Member
27
57
13
Location
Gulf Coast, Texas
Fully Synthetic, Partial Synthetic, etc.
Just throwing this in ... don't confuse those terms with their english language meanings. By law, partial synthetics are sold as "full" synthetics; "partial" is not a thing on oil labels; but, "blended" represents an oil with a little syntjetic blended in.

Actual english language full synthetics are available and pricey from Amsoil and Redline. I only know one diesel on a full synthetic diet; my deuce.5 gets Rotella T6 15w40 by the pail (Amazon often has a seller offering the 5gal pails under $200).

Sent from my SM-S908U using Tapatalk
 
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