[C66 Racing]

AMSOIL 0W-20 (ASM), 5W-30 (ASL) and 10W-30 (ATM) Synthetic Motor Oils join AMSOIL Signature Series 0W-30 to round out the new Signature Series line. Signature Series 0W-30 is now identified by product code AZO. Product code SSO will be discontinued and is only available while supplies last.

In addition to being reformulated to meet the latest API SN Resource Conserving and ILSAC GF-5 industry specifications, the new Signature Series line features all-new packaging and represents the very best motor oils AMSOIL has to offer, allowing motorists to take advantage of maximum extended drain intervals. In the interest of consistency and clarity within the Signature Series line, all four motor oils are recommended for drain intervals of up to 25,000 miles/one year, whichever comes first (15,000 miles/one year in severe service conditions).

AMSOIL Oils labeled for Dexos1:
AMSOIL Signature Series 100% Synthetic 0w30 (Product Code AZOQT)
AMSOIL Signature Series 100% Synthetic 5w30 (Product Code ASLQT)
AMSOIL XL Synthetic 5w30 (Product Code XLFQT)
AMSOIL OE Synthetic 5w30 (Product Code OEFQT)

As always, I'm happy to offer AMSOIL to forum members at dealer wholesale, about 25% below retail, via the AMSOIL Preferred Customer Program. Drop me a PM if interested.
:cheers:

 

[MoFex]

That's an interesting information. I like the Amsoil products and used them in my last 3 cars in differentials, transmissions and power steering. Not engines though. Given the problems we had with CTS timing chains I would be very reluctant to do the extended OCI even with Amsoil oils.

However, I do have sufficient amount of Amsoil signature series oil 0w30 for two oil changes in my wife's car.

Thanks for sharing this info.

 

[C66 Racing]

... Given the problems we had with CTS timing chains I would be very reluctant to do the extended OCI even with Amsoil oils.
...

Lots of people with similar views which is probably why AMSOIL recently came out with the very cost effective OE line - good basestock, but not paying for the extra detergents and dispersants needed for the long OCI of the signature series. :cheers:

 

[smithb]

This is interesting. AMSOIL salesmen are always saying their products were superior, however they had to "reformulate" thier oils to meet GF-5 when existing motor oils (Mobil1 for instance) already met the requirments. So their oil was inferior in some way or there would have been no need to change what they were doing. Mobil1 (or Penzoil) didn't need to change to meet the new standard. I guess this confirms what many suspected.

 

[C66 Racing]

ILSAC GF-5 is a new standard and all manufacturers had to reformulate to meet it, though most don't tell you about their reformulations. What was really the driver here was GMs new Dexos1 formulation. ILSAC GF-5 and Dexos1 have competing priorities and not all oils meet both. GF-5 has more stringent requirements for emissions system durability, fuel economy, and E85 emulsion retention. Dexos1 is more stringent for volatility, sludge protection, piston cleanliness, and turbo-charger protection. AMSOIL meets the most stringent of both. Others do as well, so I suggest owners use what they feel most comfortable with.

 

[Richard MacGregor]

Yup C66,

The one thing that ends any argument in my mind is the old oil analysis. It is proof of what is happening in your engine. (it is also a good tool to use determining where your oil change interval should be)

I had a similar experience comparing Mobil 1 to Redline oil with oil analysis in my Z06.
Isn't it surprising that the Mobil 1 Extended formula doesn't meet GM4718M spec as does the plain basic Mobil 1.

Richard

 

[Spyke]

The only thing I'm seeing in those UOA is that the engine was breaking in and M1 was used during the beginning stage. Of course Amsoil had better results because the engine has time to breakin' in. The Amsoil results are not that great.. its juts regular breaking engine.

I used M1 since I got the car and I have done UOA analysis with 10k to 13k miles OCI and the results are way better than what I'm seeing with your Amsoil results. Today, my engine has approx. 265 000 kms and on my next oil change I'll take a sample to the lab.

engine's km:
198239 . . 179376 . . 164415
oil use in km:
18863 . . 12468 . . 16325
Fe: 30 - 16 - 29
Cu: 2 - 1 - 2
Pb: 7 - 3 - 6
Sn: 1 - 1 - 0
Al: 3 - 2 - 4
Cr: 1 - 0 - 1
Mo: 94 - 60 - 84
Si: 8 - 5 - 6
Mg: 14 - 12 - 13
B: 47 - 37 - 70
Na: 2 - 0 - 5
Ca: 2598 - 3094 - 2411
P: 743 - 757 - 683
Mn: 2 - 1 - 2
Zn: 873 - 868 - 805
K: 5 - 0 - 5


Soot: 0 - 0 - 0
AW/EP 19 - 19 - 20
Water-EP 7 - 10 - 7
Degradation(1) 0 - 0 - 0
Degradation(2) 22 - 22 - 23

cSt 40: 59.39 - 57.70 - 56.53
cSt 100: 10.26 - 10.10 - 9.73

TBN: 5.41 - 6.31 - 4.84

Glycol(%): 0.01 - 0.00 - 0.00

Water: <0.01 - <0.01 - <0.01

Viscosity Index: 162.00 - 164.00 - 158.00

Dilution: 0 - 0.50 - 0

C66, I'm not saying Amsoil is not a good oil but when someone wants to prove which one is better, just be sure that you use the same engine, at the same time, same miles interval, same engine operations etc. I've used Amsoil in my grand prix but it was way to expensive versus another synthetic that i decided to let go Amsoil.

Also I have a question for you: why Amsoil always exceed but not meet gm requirements? I never saw Amsoil on GM approval list, is there a reason why?

 

[C66 Racing]

The only thing I'm seeing in those UOA is that the engine was breaking in and M1 was used during the beginning stage. Of course Amsoil had better results because the engine has time to breakin' in. The Amsoil results are not that great.. its juts regular breaking engine.
Also I have a question for you: why Amsoil always exceed but not meet gm requirements? I never saw Amsoil on GM approval list, is there a reason why?

I do agree with you about the overall break in trend of the engine, but disagree with your assessment about AMSOIL results "not that great". Blackstone reports lab averages for that engine family at similar engine age as you likely know. If you look at the lab average for copper for my M1 sample, you'll see they report it as 102 ppm vs. 139 ppm for the M1 in my sample. M1 was over lab average. Later in life after several AMSOIL samples, they report the lab average as 95 ppm (lower), but my engine had dropped all the way to 35 ppm, well below the lab average. So the lab average trended down, but my engine trended down a lot faster. But, you are correct that to get a really fair test, I should have put M1 back in the car. That said, it was my car and I didn't want to go back to M1 and then I sold it when I moved to DC.

As for a comparison of my engine to yours, I don't think you can draw any conclusions from that as they are different engines (meaning 3.6 vs 6.0 LS2) and your engine is way later in life - basically same thing you are saying near the bottom of your post.

As for the "exceeds" part:
Coalition Seeks FTC Review of Dexos - mentions costs for Dexos licensing that Z71 discussed above.
Chevron, Citgo Pass on Dexos - note that near the bottom of this article it also mentions that Valvoline and Castrol also took a pass on Dexos licensing.
:cheers:

 

[JimmyH]

This thread was started by the OP to give information about his product. It was not started so folks can take a crap in it. If people want to promote Amsoil, that is their right. If you want to bash it, that is your right. But do it in your own thread. Not in an authorized vendor's.

 

[JimmyH]

Final warning; this is C66's thread. Keep it on topic or else.