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
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