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#3082353 - 07/31/13 09:25 PM Motorcraft XL-17 mystery additive
Vcode Offline


Registered: 07/31/13
Posts: 5
Loc: Racine, WI
Apologies if this has been addressed.......

I have a 2013 Mustang GT with the 5.0 V-8 Coyote motor. It has developed an engine tick at 1300 miles. It sounds like the ignitor button on a gas grill or 2 ball bearings on strings hitting each other. The problem occurs at hot idle and low rpm. One fix is to add a tensioner to the A/C belt. The other is to add 8oz of Motorcraft mystery additive called XL-17 ($32/8oz). It's not the A/C belt on mine.

Does anyone have any idea what this stuff is? Ford isn't saying nor are they saying what the problem is that this additive fixes. It is a nearly immediate fix on some engines, but reoccurs as soon as the oil is changed without the additive. Many people believe it is some sort of break-in additive, added by Ford at the factory for engines that have the tick. That is why many people don't notice the tick until their first oil change when it shows up almost immediately.

Can anyone shed any light on this? First what is this XL-17 additive (are there any other alternatives), and second, what is causing the tick in the first place? There have been numerous reports of this for several years now with no cause listed from Ford, just the potential mystery additive. Thanks for any help!

Greg

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#3082384 - 07/31/13 09:56 PM Re: Motorcraft XL-17 mystery additive [Re: Vcode]
michaelluscher Offline


Registered: 10/07/12
Posts: 1356
Loc: NYC
XL-17 MSDS

CALLING ALL EXPERTS!!!!!!!!
Please decode all the info I could find, it appears to be some sort of Ford blessed Modifier...

Hopefully, someone could have more input...
I would suggest taking it to a Ford dealer, make some noise, see if you could get an engineer out or get your car/name/VIN on the list so that your problem is known, a solution be offered when one is found, and like a few other people on various forum's have had happen, they might extend your powertrain warranty.
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#3082408 - 07/31/13 10:22 PM Re: Motorcraft XL-17 mystery additive [Re: Vcode]
antiqueshell Offline


Registered: 03/02/12
Posts: 4255
Loc: chicago, Illinois
So the OP believes that Ford is sending out new vehicles with major engine defects and hiding them with this additive? If true that is a serious fraud.

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#3082411 - 07/31/13 10:25 PM Re: Motorcraft XL-17 mystery additive [Re: Vcode]
jorton Offline


Registered: 07/04/03
Posts: 2761
Loc: San Antonio, TX
hydraulic fluid - principal ingredient

carbon black - used in tires, hoses, belts to strengthen rubber, resists UV, printer toner color pigment

naphtha - solvent

(You still need an Expert.)
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#3082414 - 07/31/13 10:26 PM Re: Motorcraft XL-17 mystery additive [Re: Vcode]
Errtt Offline


Registered: 11/14/10
Posts: 2145
Loc: California
Was discussed once (at work) and I heard:
Special valve train fluid (to seat the valve train}... lol
Friction modifier
Oil thickener
Make-up oil.... lol okay

Seem nobody knew was my conclusion.

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#3082531 - 08/01/13 05:35 AM Re: Motorcraft XL-17 mystery additive [Re: Vcode]
Boomer Offline


Registered: 09/19/08
Posts: 1657
Loc: Pennsylvania
Carbon black? This is an "advanced" formula of Arco Graphite, it seems. You might be better off using a moly add. Seems Ford is trying to cover up a manufacturing issue. Reminds me of the old Pinto engines where they forgot to drill some of the oiling holes needed and eventually, after noises, the engine failed.
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#3082541 - 08/01/13 06:02 AM Re: Motorcraft XL-17 mystery additive [Re: Vcode]
volk06 Offline


Registered: 10/04/10
Posts: 4299
Loc: .
If you run a heavier oil like M1 0w-40 the noise goes away on some of them.
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#3082564 - 08/01/13 06:31 AM Re: Motorcraft XL-17 mystery additive [Re: Vcode]
racin4ds Offline


Registered: 05/07/10
Posts: 393
Loc: Winchester, VA
I'm betting a heavier oil instead of that [censored] 5W20 would fix it! I still don't agree with using this thin oil in a very high specific output engine like the new 5.0 or any high revving, high HP V8 for that matter. I think the 20w stuff has its place but its not here!
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#3082579 - 08/01/13 07:00 AM Re: Motorcraft XL-17 mystery additive [Re: Vcode]
229 Offline


Registered: 06/23/11
Posts: 714
Loc: Mid Atlantic
Probably the timing chain set. The tensioners have a difficult time controlling the long timing chains when the oil pressure is low. Hot oil at idle is the time when oil pressure is lowest. I would get an OP reading with a manual gauge.
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#3082587 - 08/01/13 07:12 AM Re: Motorcraft XL-17 mystery additive [Re: Vcode]
Vcode Offline


Registered: 07/31/13
Posts: 5
Loc: Racine, WI
Thanks for all the input so far! A little more research shows this is a fix for some diesel engines as well. I've seen numerous reports going back to 2010, when this engine was first introduced. All I've seen from the Ford engineers is that the noise should go away after 10-15K miles.

I do agree that 0W-20 seems thin for this engine. I really don't drive much in the winter so I will likely change to a 0W-30.

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#3082604 - 08/01/13 07:35 AM Re: Motorcraft XL-17 mystery additive [Re: Vcode]
Miller88 Offline


Registered: 04/09/08
Posts: 6856
Loc: Onondaga County
Originally Posted By: Vcode
Thanks for all the input so far! A little more research shows this is a fix for some diesel engines as well. I've seen numerous reports going back to 2010, when this engine was first introduced. All I've seen from the Ford engineers is that the noise should go away after 10-15K miles.

I do agree that 0W-20 seems thin for this engine. I really don't drive much in the winter so I will likely change to a 0W-30.


If you switch to a heavier oil grade and the engine blows up, say goodbye to your warranty
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#3082625 - 08/01/13 08:09 AM Re: Motorcraft XL-17 mystery additive [Re: Vcode]
demarpaint Offline


Registered: 07/03/05
Posts: 21378
Loc: NY
I'd open up a case with Ford and have them fix it. It is funny how they shun additives, then when they have a problem endorse them in hopes to save on costly repairs. lol
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#3082627 - 08/01/13 08:10 AM Re: Motorcraft XL-17 mystery additive [Re: Miller88]
Vcode Offline


Registered: 07/31/13
Posts: 5
Loc: Racine, WI
Engines with the Track Pak and Boss 302 motors use 5W-50 oil.Not that that would make a difference with a warranty claim......

I will open a case but I hate working with dealers. I just know I'll get the "that's normal noise" response like many people with the same problem have.


Edited by Vcode (08/01/13 08:12 AM)

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#3082629 - 08/01/13 08:17 AM Re: Motorcraft XL-17 mystery additive [Re: Vcode]
demarpaint Offline


Registered: 07/03/05
Posts: 21378
Loc: NY
Originally Posted By: Vcode


I will open a case but I hate working with dealers. I just know I'll get the "that's normal noise" response like many people with the same problem have.


Good on you. You'll probably get that response, but if the problem gets worse it will be documented. Also if you fight hard enough they might actually do something. You can have the situation escalated to a higher level if you play it right.
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#3082794 - 08/01/13 10:59 AM Re: Motorcraft XL-17 mystery additive [Re: Miller88]
panthermike Offline


Registered: 04/01/08
Posts: 3167
Loc: Phoenix, AZ
Originally Posted By: Miller88
Originally Posted By: Vcode
Thanks for all the input so far! A little more research shows this is a fix for some diesel engines as well. I've seen numerous reports going back to 2010, when this engine was first introduced. All I've seen from the Ford engineers is that the noise should go away after 10-15K miles.

I do agree that 0W-20 seems thin for this engine. I really don't drive much in the winter so I will likely change to a 0W-30.


If you switch to a heavier oil grade and the engine blows up, say goodbye to your warranty


Doesn't the Magnuson-Moss warranty act protect you in this situation?

I've heard of this noise before, surprised it's still going on in at least the '13 models. That additive doesn't "look" like it has anything special to it at all. I wonder if Mos2 might have a similar effect, or thicker oil as mentioned.
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