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#4681392 - 03/01/18 10:08 AM Zinc and Phosphorus Levels in UOAs
mbacfp Offline


Registered: 09/02/15
Posts: 837
Loc: California
Hello all,

In looking at my past oil analysis results, I was curious about Zinc and Phosphorus levels. See link for UOA below.

https://www.bobistheoilguy.com/forums/ub...owe#Post4355305

My UOA with Valvoline 5w-40 (CJ-4) showed Zinc at 1,340 and Phosphorus at 1,065

My UOA with Delvac 5w-40 (CJ-4) showed Zinc at 977 and Phosphorus at 878.

Both are CJ-4 so why did Delvac show lower numbers? Is Zinc and Phosphorus sacrificial? My Delvac 5w-40 is from 2016 so I doubt they bottled CK-4 in it. Wear numbers are good with Delvac especially since I towed vs not towed on Valvoline. What do you all think?



Edited by mbacfp (03/01/18 10:12 AM)
_________________________
2014 F-550 PSD..........M1 Delvac ESP 5w-40 + OEM
2018 Dodge Charger SRT Hellcat
2012 Toyota Sienna LTD 3.5L V6
2003 Dodge Durango R/T 4x4 5.9L V8

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#4681415 - 03/01/18 10:50 AM Re: Zinc and Phosphorus Levels in UOAs [Re: mbacfp]
Kamele0N Offline


Registered: 02/09/15
Posts: 2042
Loc: Slovenia
Has delvac both SN & CJ-4 certificates? If so...that is your answer for why lower ZDDP levels...


Edited by Kamele0N (03/01/18 10:51 AM)
_________________________
2011 Hyundai i30 1.4 CVVT Shell Helix Ultra 5w40
1997 Toyota Landcruiser KZJ95 3.0 TD various 10w40

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#4681420 - 03/01/18 10:58 AM Re: Zinc and Phosphorus Levels in UOAs [Re: mbacfp]
mbacfp Offline


Registered: 09/02/15
Posts: 837
Loc: California
I checked the current CK-4 spec sheet and both have SN. Found both CJ-4 spec sheets and both don't meet SN. Thanks for the idea.
_________________________
2014 F-550 PSD..........M1 Delvac ESP 5w-40 + OEM
2018 Dodge Charger SRT Hellcat
2012 Toyota Sienna LTD 3.5L V6
2003 Dodge Durango R/T 4x4 5.9L V8

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#4681434 - 03/01/18 11:11 AM Re: Zinc and Phosphorus Levels in UOAs [Re: mbacfp]
Kamele0N Offline


Registered: 02/09/15
Posts: 2042
Loc: Slovenia
Api Cy... HDEO

Api Sy + whatever... PCMO

Cheers1
_________________________
2011 Hyundai i30 1.4 CVVT Shell Helix Ultra 5w40
1997 Toyota Landcruiser KZJ95 3.0 TD various 10w40

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#4681619 - 03/01/18 04:15 PM Re: Zinc and Phosphorus Levels in UOAs [Re: Kamele0N]
SR5 Offline


Registered: 07/07/15
Posts: 4468
Loc: Down Under
Originally Posted By: Kamele0N
Has delvac both SN & CJ-4 certificates? If so...that is your answer for why lower ZDDP levels...

For API SN the Phos & Zinc levels are restricted for 30 & 20 grade oils and lower, but for 40 grades and higher there is no restriction.

I'm using Penrite 10W40 and it has 1200 ppm zinc and it's rated API SN.
_________________________
Penrite Vantage 10W40 SN & A3/B4 + Wesfil-Cooper Z154

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#4681713 - 03/01/18 06:38 PM Re: Zinc and Phosphorus Levels in UOAs [Re: Kamele0N]
Garak Offline


Registered: 12/05/09
Posts: 24600
Loc: Regina, Saskatchewan, Canada
Originally Posted By: Kamele0N
Api Sy + whatever... PCMO

Here, it would be C first, then S, which allowed the phosphorus waiver for ILSAC grades at the time.
_________________________
Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, NAPA Gold 7356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515

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#4683073 - 03/03/18 09:53 AM Re: Zinc and Phosphorus Levels in UOAs [Re: mbacfp]
jeff78 Offline


Registered: 06/06/17
Posts: 129
Loc: New York
Originally Posted By: mbacfp
Both are CJ-4 so why did Delvac show lower numbers?


CJ-4 requires that phosphorous levels be between 600 and 1200 ppm, so the Rotella and Delvac are both in spec.

They're different to each other because they're different oils.

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