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Mustang Forums
2011-2014 Mustangs
2011-2014 Mustang Talk
2013 GT now takes 5w50??
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<blockquote data-quote="cidsamuth" data-source="post: 11815112" data-attributes="member: 110091"><p>The engineer who gave it to my Service Adviser wouldn't tell him what was in it. I got to see the bottle -- a black unmarked bottle, with no labels. Had what looked like black shoe polish in it. Some folks theorized it was graphite.</p><p></p><p>That was in the fall of 2010. Later, folks got something called XL-17 from Ford and used it with mixed results. Honestly, I'm only about 50% sure it was the same stuff they put in my engine.</p></blockquote><p></p>
[QUOTE="cidsamuth, post: 11815112, member: 110091"] The engineer who gave it to my Service Adviser wouldn't tell him what was in it. I got to see the bottle -- a black unmarked bottle, with no labels. Had what looked like black shoe polish in it. Some folks theorized it was graphite. That was in the fall of 2010. Later, folks got something called XL-17 from Ford and used it with mixed results. Honestly, I'm only about 50% sure it was the same stuff they put in my engine. [/QUOTE]
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2013 GT now takes 5w50??
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