5W-20, 5W-50, or 10W-40?? - Mustang Evolution

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Old 07-28-2014, 12:44 AM   #1
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5W-20, 5W-50, or 10W-40??

Ford recommends you put 5W-20 into the 2012 GT, yet I've seen a few people say they run with 5W-50 or even 10W-40. Could someone please enlighten me as to why this is done sometimes? Thanks!
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Old 07-28-2014, 04:53 AM   #2
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10W-30
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Old 07-28-2014, 05:13 AM   #3
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Old 07-28-2014, 05:47 AM   #4
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Quote:
Originally Posted by Mustang Coyote View Post
Ford recommends you put 5W-20 into the 2012 GT, yet I've seen a few people say they run with 5W-50 or even 10W-40. Could someone please enlighten me as to why this is done sometimes? Thanks!
5w-20 is recommended by Ford to help with the ever tightening fleet fuel economy ratings. While a minute amount of gain you and I might see in fuel economy by using 5w-20, over the thousands of cars Ford sells, it adds up and helps their "numbers". 5w-50 is recommended in the track pac/Boss engines, as they are built to rev higher. Since 5w-20 is not sold in some European countries, Ford recommends 5w-30 or 10w-30.

No input on the 10W-40 recommendation.
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Old 07-28-2014, 05:48 AM   #5
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I own a track pack gt and it recommends 5w-50 so should I actually use a 50? I assumed it was 5w-30 until I looked.


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Old 07-28-2014, 05:53 AM   #6
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I own a track pack gt and it recommends 5w-50 so should I actually use a 50? I assumed it was 5w-30 until I looked.


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Depends. Do you drive the car "spiritedly" as it was designed for?
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Old 07-28-2014, 06:47 AM   #7
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I don't daily it but yeah when I drive it I tend to "wake it up" pretty frequently. I drive it a couple times a week depending on weather.


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Old 07-28-2014, 06:54 AM   #8
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Check out this thread started by unleashbeast. He is very knowledgeable about which lubricants to use. It's a long thread but a worthy read. They actually test different oils from different 5.0 & Boss owners and compare them for what's best to use.

http://www.svtperformance.com/forums...302-UOA-thread
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Old 07-28-2014, 07:00 AM   #9
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Great I'll check it out thanks for the help


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Old 07-28-2014, 09:35 AM   #10
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That's a great thread that Troy started on SVT Performance. I urge everyone to read it.
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Old 07-28-2014, 10:25 AM   #11
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Old 07-28-2014, 10:27 AM   #12
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Mobil 1 extended performance 5w 30

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Old 07-28-2014, 10:48 AM   #13
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I bought my car used. I know for sure it has brembo brakes and 3.73 gears (I'm pretty sure about this since I absolutely rip through first gear compared to a stock v6 I used to have) . I probably have the track pack right?? Yet my oil cap still recommends 5w-20...
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Old 07-28-2014, 11:13 AM   #14
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Quote:
Originally Posted by Mustang Coyote View Post
I bought my car used. I know for sure it has brembo brakes and 3.73 gears (I'm pretty sure about this since I absolutely rip through first gear compared to a stock v6 I used to have) . I probably have the track pack right?? Yet my oil cap still recommends 5w-20...
If your rear cover is the GT500 finned style then you have the track pack. But I'm guessing you don't have it.

There's also a tag on the rear that tells you what gears you have. You can also tell by the axle code on the door jam.
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Old 07-28-2014, 12:42 PM   #15
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Quote:
Originally Posted by Mustang Coyote View Post
I bought my car used. I know for sure it has brembo brakes and 3.73 gears (I'm pretty sure about this since I absolutely rip through first gear compared to a stock v6 I used to have) . I probably have the track pack right?? Yet my oil cap still recommends 5w-20...
Not necessarily. 3.73 is a standalone option you can get on top of the Brembo package which is what you probably have. All track pack Stangs were spec'd for 5W-50 on the cap.
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Old 07-28-2014, 03:10 PM   #16
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I switched over to royal purple HPS 10-40,no ticking or unwanted noise
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Old 07-29-2014, 08:15 AM   #17
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Quote:
Originally Posted by AJcruz1 View Post
Check out this thread started by unleashbeast. He is very knowledgeable about which lubricants to use. It's a long thread but a worthy read. They actually test different oils from different 5.0 & Boss owners and compare them for what's best to use.

Official GT 5.0/Boss 302 UOA thread
Its a great thread, and I read it all once on a rainy weekend, but it leaves one thing out I have not seen definitively. Is their harm in using 5-50 instead of 5-20 in regulate 5.0 Coyotes that are not Boss or track pack? It seems those using non-ford oil or other weights of oil are the ones reporting "ticks" right after oil changes that go away in 100-200 miles or so.

I my knowledge the Track Pack options do not change anything on the motor do they? Anyone definitively know this?
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Old 07-29-2014, 08:53 AM   #18
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Wink 5W-20, 30 40 50

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Its a great thread, and I read it all once on a rainy weekend, but it leaves one thing out I have not seen definitively. Is their harm in using 5-50 instead of 5-20 in regulate 5.0 Coyotes that are not Boss or track pack? It seems those using non-ford oil or other weights of oil are the ones reporting "ticks" right after oil changes that go away in 100-200 miles or so.

I my knowledge the Track Pack options do not change anything on the motor do they? Anyone definitively know this?
Some people like the heavier weights (5W-30, 10W-40, 5W-50) because the heavier weights tend to have higher film thicknesses at higher temperatures. While fuel economy does play a small amount in oil choice, it is really pumpability. Lower vis grades are easier to pump. I can go through the math models, but that is the main reason, especially when you are at lower temperatures. As long as you use an oil that meets API SN ILSAC GF-5 and you change it as recommended , regardless of Vis Grade you'll be fine, It's very difficult for OEM's to prove an oil related failure as long as you have documentation to support you've had it changed.
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Old 07-29-2014, 09:42 AM   #19
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^Yep

Quote:
Originally Posted by ArtU View Post
Is their harm in using 5-50 instead of 5-20 in regulate 5.0 Coyotes that are not Boss or track pack?

I my knowledge the Track Pack options do not change anything on the motor do they? Anyone definitively know this?
Ford spec'd 5W-50 for track pack and Boss because they assume those that have the option or bought a Boss wanted to track them. Higher weights offer more protection in high heat as stated in the last post. The Track Pack stangs have have the Boss oil cooler and larger/more efficient Radiator but to my knowledge these don't require a different weight if oil.
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Old 07-29-2014, 09:53 AM   #20
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Originally Posted by AJcruz1 View Post
^Yep
Ford spec'd 5W-50 for track pack and Boss because they assume those that have the option or bought a Boss wanted to track them. Higher weights offer more protection in high heat as stated in the last post. The Track Pack stangs have have the Boss oil cooler and larger/more efficient Radiator but to my knowledge these don't require a different weight if oil.
Thanks , I know that part but Boss and Coyote motors have different internals, and the Boss has value train differences to RPM higher that I am understanding the Track pack does not. Some have said (unverified talk) that the thinner oil could keep certain things up-top oiled better but who knows. And now the 2013-2014 Coyotes are missing piston skirt squirters.

So my conjecture is simply if no real "Engine" difference in a Track Pack vs Shelf Coyote, then the oil weights should not contribute to issues like the "ticks" folks are having, but we don't have data to verify it and Ford will only say we have to use whats recommended for the model car.
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