GT S197 General DiscussionThis section is for technical discussions pertaining specifically to the V8 variation of the 2005 and newer Ford Mustang.
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Looked under the hood of a 2013 5.0 GT and noticed that the oil filler cap now says 5-50 oil and that Ford recomends full synthetic oil so now the new GT's will use the same weight oil as the Shelby GT 500's.
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Well I started the thread and I know what I saw which was a oil fill cap on a 2013 5.0 Gt that said 5-50. Could it have been a Boss 302 cap? I suppose so but if it was it came from the factory with the wrong oil fill cap. Kinda of makes you wonder about Ford quality control if it was a Boss 302 oil filler cap dosen't it?
On another forum, folks are saying that the 2013 Mustangs with the 'track pack' option are coming with oil caps that say 5w-50, while the owner's manual still says 5w-20. Seems to be much speculation on which is correct.
Will be interesting to see how this one plays out.
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