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#2267078 - 05/20/11 11:58 PM Difference between Ford oil specifications?
tinmanSC Offline


Registered: 09/07/10
Posts: 2222
Loc: Oswego, IL
I have taken over maintenance on a 2007 Mercury Milan. It has some warranty coverage left so I would like to stick to approved oils. The manual states WSS-M2C930-A oils are to be used. There are several oils that meet this approval, but is there a way to know of this approval has been superseded or replaced? Some oils are WSS-M2C930-A and some are WSS-M2C946-A. What is the difference? This is my first voyage into Ford approvals.
_________________________
Cost of Hobby=2L
(Where L=Cost of Lubricant)
95 Lexus SC300 [email protected], 2000 [email protected] both VML Full Syn+Purolator PSL20195(soon to be Wix)

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#2267086 - 05/21/11 12:10 AM Re: Difference between Ford oil specifications? [Re: tinmanSC]
crazyoildude Offline


Registered: 07/23/08
Posts: 9103
Loc: New Jersey
i would use any sm 5w20 in that car...Motorcraft oil is a quality oil and priced good
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I Won't Use Oil Filters With Louvers.Also Not A Fan Of Oil Jugs That Don't Have A Security Inner Seal..Presently Using Fram Ultra & Mobil 1 5w20/30

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#2267171 - 05/21/11 07:00 AM Re: Difference between Ford oil specifications? [Re: tinmanSC]
Sayjac Offline


Registered: 10/13/08
Posts: 10375
Loc: The Old North State
It appears that the WSS-M2C930-A is the 5w20 oil spec that meets the Ford oil spec.

The WSS-M2C946-A spec is for the 5w30 oil spec that meets the Ford oil spec.

It also appears that WSS-M2C945-A replaces/supersedes the WSS-M2C930-A 5w20 spec.

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#2267568 - 05/21/11 06:03 PM Re: Difference between Ford oil specifications? [Re: Sayjac]
tinmanSC Offline


Registered: 09/07/10
Posts: 2222
Loc: Oswego, IL
Originally Posted By: sayjac
It appears that the WSS-M2C930-A is the 5w20 oil spec that meets the Ford oil spec.

The WSS-M2C946-A spec is for the 5w30 oil spec that meets the Ford oil spec.

It also appears that WSS-M2C945-A replaces/supersedes the WSS-M2C930-A 5w20 spec.

linkable sources for your data?
_________________________
Cost of Hobby=2L
(Where L=Cost of Lubricant)
95 Lexus SC300 [email protected], 2000 [email protected] both VML Full Syn+Purolator PSL20195(soon to be Wix)

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#2267660 - 05/21/11 07:53 PM Re: Difference between Ford oil specifications? [Re: tinmanSC]
Hallmark Offline


Registered: 10/28/10
Posts: 830
Loc: Pacific Northwest
The WSS-M2C-930-A spec is for the last generation API SM/GF-4 5W20 motor oil. The new API SN/GF-5 5W20 motor oil now specs WSS-M2C945-A under Ford's nomenclature. All Ford did was change a couple of numbers to reflect the API SM-to-SN transition.

Ditto re: 5W30 with a Ford spec change from 929 (old) to 946 (new).

The re-spec'd oils are 'back compatible' per API standard.

As for linkable sources, surf away...check Ford's Engineering Material Specifications data.

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#2268553 - 05/23/11 12:22 AM Re: Difference between Ford oil specifications? [Re: Hallmark]
tinmanSC Offline


Registered: 09/07/10
Posts: 2222
Loc: Oswego, IL
Thanks. Cheers2
_________________________
Cost of Hobby=2L
(Where L=Cost of Lubricant)
95 Lexus SC300 [email protected], 2000 [email protected] both VML Full Syn+Purolator PSL20195(soon to be Wix)

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#2268669 - 05/23/11 08:12 AM Re: Difference between Ford oil specifications? [Re: tinmanSC]
tig1 Offline


Registered: 01/03/09
Posts: 11679
Loc: Illinois
I'm using M1 0-20 in both of my Duratechs, and it does meet the spec.
_________________________
2007 Ford Fusion 189,000 miles
M1 0-20 AFE
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10,000 mile OCIs on both engines
M1 ATF
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