Originally Posted By: aquariuscsm
I'm willing to bet they spec Motorcraft oil because it means more money for Ford,since it's a Ford branded product. The oil fill cap says "recommended" and not "required". As long as the spec viscosity is used,doesn't that legally fulfil the warranty concerns? Wonder how Syntec/M1/Redline 5W50 measures up compared to the Motorcraft?
It says Motorcraft on the cap because that's what they recommend, of course.
They don't spec Motorcraft oil however. They spec an oil meeting WSS-M2C931-B. Currently the only two oils on the market that meet it are QSUD 5w-50 and Motorcraft 5w-50.
That said, it appears the 2014 manual doesn't REQUIRE that spec anymore:
http://www.fordservicecontent.com/Ford_Content/catalog/owner_guides/14musom2e.pdf
Originally Posted By: Ford
6. Your engine has been designed to use Motorcraft engine oils or equivalent oils that meet Ford
specifications.
It is also acceptable to use an engine oil of recommended viscosity grade that
meets API SN requirements and displays the API Certification Mark for gasoline engines.
But I thought this was interesting:
Originally Posted By: Ford
8. Do not use API S category oils labeled as SN, SM, SL or lower category unless the label also
display the API certification mark. These oils do not meet the requirements of the engine and
emissions system.
In contrast, the 2013 Manual for the GT states:
Originally Posted By: Ford
To protect your engine and engine’s warranty, use Motorcraft SAE
5W-20 or an equivalent SAE 5W-20 oil meeting Ford specification
WSS-M2C945-A.
Originally Posted By: Ford
Use of synthetic or synthetic blend motor oil is not mandatory. Engine oil need only meet the
requirements of Ford specification WSS-M2C945-A and display the API Certification Mark.
Track Pack:
Originally Posted By: Ford
WSS-M2C931-B with API
Certification Mark
And for the BOSS 302:
Originally Posted By: Ford
Use Motorcraft SAE 5W-50 full synthetic or an equivalent SAE 5W-50
full synthetic oil meeting Ford specification WSS-M2C931-B.
So it looks like you would be doing alright by your warranty with a 2014 Mustang GT Track Pack if you used M1 5w-50. But that wouldn't be the case with a 2013, LOL!