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dwm1918 04-23-2012 12:33 PM

2013 5.0 Oil Weight
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.

Hysteric 04-23-2012 12:45 PM

Would it be wise for the 11-12's to change over as well?

safetyfastgt 04-23-2012 03:07 PM

Wonder if there will be a TSB. Of course, there are a few internal differences on the new Coyote.

cidsamuth 04-23-2012 04:27 PM

Someone claimed the 2013 used 5w-50 on ALLFORDMUSTANGS also. He even supplied a picture. Turned out, that was a picture of the Boss fill cap.

In other words, this thread is bogus. The 2013 5.0 (non-boss) calls for 5w-20.

dwm1918 04-23-2012 04:49 PM

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?

cidsamuth 04-23-2012 08:46 PM

I can't speak for what you saw or thought you saw. Bottom line is, the 2013 Mustang GT (non-Boss) calls for 5w-20 from Ford.

Now, you could speculate on whether 5w-50 would hurt it, regardless to what Ford says, but that is a debate waged on many, many threads.

kenv 04-24-2012 07:00 AM

Isin`t 5-50w a little thick especialy in cooler weather??

fordplay 04-24-2012 08:23 AM

No. Its not a little thick the the first number the 5 is your cold weather thickness if you want to word it like that

Ford_Dude 04-24-2012 10:14 AM

the 5w is cold "thinkness" and a 5W means that you can still start your car in -20F (it might be -30F)

the 50 is the operational "thickness" so ya it s a bit thick but don't worry about weather unless you go to a 0W area.

cidsamuth 04-25-2012 12:11 PM

I may owe the OP an apology here . . . sort of.

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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