Amsoil ACD

[KW]

Would the Amsoil ACD 10W30/30 be a reasonable upgrade form ATM 10W30?

The Series 3000 5W30 is very pricey and the ACD looks to have the same specs. as the S3000.

 

[Craig]

What are using it in? ATM is mostly a gasoline engine oil suitable for light diesel whereas the ACD is tuned more to
heavy duty diesel suitable for gas.
You will notice that the API letters/numbers on the can start with
S (spark) and end with C (compression) on the ATM.
The opposite is true in the ACD. This is how one knows what
the oil is formulated for first.

I personally use the ACD in my boat with a 300hp TA CAT diesel.

I know that the HDD is a very good product. In fact the owner of Amsoil uses this oil in his vehicles.
However answering your question, the ACD is a much heavier duty oil than the ATM. It will work fine in either a gasoline or diesel engine. Just realize it's more of a diesel oil than gas.
Craig

 

[KW]

I'm thinking about using it in a 1998 Jeep Cherokee 4.0 that I use 10W30 ATM in.

It has roughly 93000 miles on it and uses no oil between 10K mile oil changes.

 

[darkdan]

I was going to try ACD in one of my cars this summer, but now that I read it...it's just a 10w30.

Maybe I'll try a cheap OTC SAE 30.

 

[DR Racing]

ACD is both 30w and a 10w30. The definition of a straight weight is no VII. Dan

 

[Craig]

I will have to ask Amsoil but I believe that the ACD is a straight
30 withour VI improvers that tests like a 10W in cold temps.
I remember when Amsoil added no VI's to their 15w40 diesel marine oil.
Craig

 

[DR Racing]

This is right off amsoil's website. Dan

quote:

---

PRODUCT DESCRIPTION
AMSOIL Synthetic 10w30/SAE 30 Diesel Oil (ACD) is formulated with premium synthetic base oils that exceed both 10w30 multi-grade and SAE 30 straight-grade viscosity requirements for outstanding performance in modern and older diesel engines. Unlike conventional SAE 30 motor oils, AMSOIL ACD has a naturally high viscosity index and does not contain paraffin (wax). It has a -36°F pour point and qualifies for SAE 10W, making it an "all season" multi-grade lubricant with a wide operating temperature range. AMSOIL ACD is formulated without viscosity index improvers (VI). This shear stable formulation stops viscosity loss and associated bearing and cylinder bore wear. AMSOIL ACD contains premium additives with a high 12 TBN to neutralize acids from blow-by, exhaust gas recirculation (EGR) and high sulfur diesel fuels. t protects against damaging piston deposits, ring sticking and sludge

---

 

[Pablo]

You guys are basically correct.

I think in a Jeep 4.0 the ACD may be an upgrade from the ATM.

I think the only thing against the ACD is the lack of quantifiable UOA data in gas engines, but there is no reason to think that the wear numbers would be too much different than ATM and maybe better....

 

[DR Racing]

Pablo, Does 15w40 D&M have VII in it. Dan

 

[Pablo]

Yes it does, or so I have been told - it does shear a bit after 10,000 miles in my turbo but it doesn't thicken like ASL or ATM.