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dwm1918 04-23-2012 11:33 AM

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 11:45 AM

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

safetyfastgt 04-23-2012 02:07 PM

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

cidsamuth 04-23-2012 03:27 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 03:49 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 07:46 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 06:00 AM

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

fordplay 04-24-2012 07:23 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 09:14 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 11:11 AM

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.

dwm1918 04-25-2012 04:55 PM

Well I went back to my dealer to look at the oil cap again. Dealer has 2 5.0 GT Mustangs with the track pack option and both have 5-50 marked on their oil caps.

cidsamuth 04-25-2012 08:13 PM


Originally Posted by dwm1918 (Post 7921764)
Well I went back to my dealer to look at the oil cap again. Dealer has 2 5.0 GT Mustangs with the track pack option and both have 5-50 marked on their oil caps.

You know, I wonder if Ford has just inadvertently confirmed the theory that they only require 5w-20 for CAFE reasons.

In theory, there will be a very limited amount of 5.0s with the track pack option. So, on those vehicles, it would be inconsequential to Ford's overall mph "average" to have a heavier oil. I can't imagine the track pack has a different engine in it to justify this from a strictly operational standpoint.

Of course, there's also the theory that they simply sent the 2013s out with the wrong oil cap . . .

JAJ 04-25-2012 11:44 PM

So, I'm in San Francisco and I went to the website and checked out the "Track Package" for the GT. It says it's "Standard Equipment" for the 2013 GT Coupe.

So, do all 2013 GT Coupes come with 5w-50 oil caps and 5w-20 Owner's Manuals? What's really going on?

I also checked, the Canadian site, and they have a "Brembo Brake Racing Package" that has most of what I thought was in the Track package. It has an oil cooler and Boss 302 radiator.

Why don't we start an internet rumor (are there any other kinds any more) that the ones with 5w-50 oil caps have a Boss 302 long block with a regular GT intake manifold. Folks would love that one...

fordplay 04-26-2012 06:23 AM

Rumor is... the track pack replaces the gt engine with a boss engine, ford just isnt telling anyone.. or ford ran out of regular 5.0 engines so they are throwing boss engines in there till they make more..
ok discuss

GT50GO 05-31-2012 11:08 PM

I have a 2013 GT Mustang with the track package. I put a 1000 "break in" miles on it then headed up from Houston to St. Louis for a visit. I went to a local Ford dealer in the St. Louis area today to change the oil at 1800 miles and they said since the oil cap said 5w 50 full synthetic that's all they would put in it but they did not have any in stock. They ordered some so I'll be going tomorrow morning. I was a little confused since the owner’s manual says 5w 20 but my oil cap say 5w 50 so I did some research on the net and discovered A LOT of debate on this 2013 track package issue. On one board I found is that a person’s Ford dealer sent them an addendum to the owner’s manual dated May 1st, 2012 that is an addendum for the 2013 GT with the track package. I've included this addendum below.

siggyfreud 06-01-2012 12:26 AM

Probably has to do with Ford wanting to run a "racing" viscosity oil on anything that's being designed or advertised for "track use". Hence the Boss and Track Pack cars asking for 5-50 oil. I doubt they're putting Boss engines into the track pack 5.0. I think they're simply saying, "you're buying the track pack, run the viscosity you would as if you were really going to track this."

UofHmustang 06-01-2012 12:32 AM

Wouldn't someone like me in hot and humid Houston want something like 10w-30? I just can't wrap my mind around using 5w-20 down here where it gets 100+.

audioAl 06-01-2012 01:57 AM

Really, my V6 cap says 5W30 and I use it, Castrol Edge Synthetic.

fordplay 06-01-2012 05:41 AM

Uodhmustang why would you want a 10w ? That number only relates to cold nothing else. As for the 30 vs 20... there are studies both ways, i live in fort worth and run 5w 30 because i do track mine sometimes .. if the 30 makes you feel better do it but a ford rep explained track use as long periods of time over 5,000 rpm.. and said the drag strip is a walkin the park for this car running 5w20

UofHmustang 06-01-2012 05:56 AM

I get my first free oil change in a few weeks, but I think in going to go with 5-30 like you. Our summers just seem to brutal for 20.

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