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#1086285 - 02/14/08 07:29 PM Mobil One's "new" 15-50 and zddp levels
dallas916 Offline


Registered: 03/29/06
Posts: 7
Loc: las vegas
I've read the chart (http://www.mobiloil.com/USA-English/MotorOil/Files/Mobil_1_Product_Guide.pdf), and I still cannot determine exactly what Mobil 1 is correct for my '91 ZR-1. The chart shows only one 15-50 and it says it has a zddp level of 1200...which is what I need for my ZR-1's LT5 engine.

I have in my hands two containers of "new" Mobil 1 15-50 oil that I've been wanting to use for my next oil change. However, the container only shows an API rating of SM, SL/CF. This alone does not indicate it would carry any more than a zddp level of 800. Though it says "...and anti-wear for performance vehicles", it does not indicate anywhere if the zddp level is more than their normal SM,SL rated oil.

It also does not say anything about "extended life" or anything to do with "extended". It doesn't say what the "extra anti-wear protection" is.

So, my question is: is this the same 15-50 oil in the chart above, or is it just a 15-50 with the same 800 zddp levels as their other oils?????????????

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#1086294 - 02/14/08 07:47 PM Re: Mobil One's "new" 15-50 and zddp levels [Re: dallas916]
Rock_Hudstone Offline


Registered: 11/13/07
Posts: 1060
Loc: New Jersey
The caps on the P/Zn levels of API GF-4 SM grade only apply to certain weights; 5w-xx, 10w-xx, 15w-50 not being one of them.

Despite the SM grade Mobil 1 15w-50 has an honest 1200 ppm zinc level.

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#1086298 - 02/14/08 07:53 PM Re: Mobil One's "new" 15-50 and zddp levels [Re: Rock_Hudstone]
dallas916 Offline


Registered: 03/29/06
Posts: 7
Loc: las vegas
If you're right that's really good news for me. Is there some way for me to verify this??

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#1086300 - 02/14/08 07:56 PM Re: Mobil One's "new" 15-50 and zddp levels [Re: dallas916]
Gregory Offline


Registered: 08/24/04
Posts: 403
Loc: Pa
you can send a sample out for a VOA, or call Mobil with your question.

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#1086311 - 02/14/08 08:07 PM Re: Mobil One's "new" 15-50 and zddp levels [Re: dallas916]
Rock_Hudstone Offline


Registered: 11/13/07
Posts: 1060
Loc: New Jersey
 Originally Posted By: dallas916
If you're right that's really good news for me. Is there some way for me to verify this??

Here is the Mobil oil product guide.

http://www.mobiloil.com/USA-English/MotorOil/Files/Mobil_1_Product_Guide.pdf

Independent VOA tests have also confirmed Mobil 1 15w-50 advertised specs.
Use it in good health. \:\!

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#1086315 - 02/14/08 08:09 PM Re: Mobil One's "new" 15-50 and zddp levels [Re: Rock_Hudstone]
dallas916 Offline


Registered: 03/29/06
Posts: 7
Loc: las vegas
I just realized that there are two pages to that guide, and that the 15-50 rates the same ZDDP levels whether it is "Extended Performance" or not.

Fantastic!

Thanks!!!!!!!!!!!!!!

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#1086319 - 02/14/08 08:17 PM Re: Mobil One's "new" 15-50 and zddp levels [Re: dallas916]
Rock_Hudstone Offline


Registered: 11/13/07
Posts: 1060
Loc: New Jersey
 Originally Posted By: dallas916
I just realized that there are two pages to that guide, and that the 15-50 rates the same ZDDP levels whether it is "Extended Performance" or not.

Fantastic!

Thanks!!!!!!!!!!!!!!

My understanding is the latest silver cap 15w-50 is a slightly different formulation and superior to the previous "Extended Performance" version.
Albeit with more or less the same ZDDP levels.

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#1086325 - 02/14/08 08:23 PM Re: Mobil One's "new" 15-50 and zddp levels [Re: Rock_Hudstone]
JHZR2 Offline



Registered: 12/14/02
Posts: 32532
Loc: New Jersey
there is a standard set of rules that make certain viscosities exempt from the caps.

Whether or not the OE enforces those caps voluntarily on other products can only truly be determined by UOA, but some PDS might explain their formulation to some extent too.

JMH

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#1124348 - 04/07/08 09:47 PM Re: Mobil One's "new" 15-50 and zddp levels [Re: JHZR2]
aquariuscsm Offline


Registered: 12/30/06
Posts: 8893
Loc: South Texas,USA
The 15W50 silver cap oil is awesome stuff. I`ve been using it ever since it came out (used to use the 15W50 Extended Performance. Used it for about 4 years). I use it year round and it`s the best out of the various oils I`ve tried.
_________________________
1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Syntec 10W40/Fram Ultra
Amsoil MTG(tranny)
Amsoil 80W90 GL5(rear diff)
Mobil 1 ATF
Redline Water Wetter

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#1124359 - 04/07/08 10:11 PM Re: Mobil One's "new" 15-50 and zddp levels [Re: aquariuscsm]
LT4 Vette Offline


Registered: 09/12/04
Posts: 11730
Loc: Jupiter, FL
If you lived closer, I got 3 cases of the old SL 'Red' cap that I would sell you cheap.

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#1124440 - 04/08/08 01:14 AM Re: Mobil One's "new" 15-50 and zddp levels [Re: LT4 Vette]
dwendt44 Offline


Registered: 05/17/06
Posts: 3571
Loc: Central Wisconsin
Some of your local Gold Wing riders might be interested in that 'red cap'.
I have my last four bottles for use in the fall.
_________________________
There's no such thing as:
Too big of a battery,
Too large of a gas tank,
or too loud of a horn,
or too bright headlights.

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#1125932 - 04/09/08 09:53 PM Re: Mobil One's "new" 15-50 and zddp levels [Re: dallas916]
dntfxr77 Offline


Registered: 02/17/08
Posts: 10
Loc: sportsman's paradise
 Originally Posted By: dallas916
my '91 ZR-1.

Nice car BTW, a very unique vette.
_________________________
2007 Chevy 25000HD Classic LBZ Duramax/Alison

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