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GT S197 General Discussion This section is for technical discussions pertaining specifically to the V8 variation of the 2005 and newer Ford Mustang.

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Old 04-23-2012, 11:33 AM   #1
dwm1918
 
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Default 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.
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Old 04-23-2012, 11:45 AM   #2
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Would it be wise for the 11-12's to change over as well?
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Old 04-23-2012, 02:07 PM   #3
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Wonder if there will be a TSB. Of course, there are a few internal differences on the new Coyote.
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Old 04-23-2012, 03:27 PM   #4
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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.
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Old 04-23-2012, 03:49 PM   #5
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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?
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Old 04-23-2012, 07:46 PM   #6
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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.
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Old 04-24-2012, 06:00 AM   #7
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Isin`t 5-50w a little thick especialy in cooler weather??
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Old 04-24-2012, 07:23 AM   #8
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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
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Old 04-24-2012, 09:14 AM   #9
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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.
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Old 04-25-2012, 11:11 AM   #10
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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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Old 04-25-2012, 11:11 AM
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2005, 2013, 50, 5w50, boss, ford, gt, gt500, mustang, oil, require, rs2, shelby, type, weight

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