Reading Plugs - Deposits?

[87gninpa]

These are out of a Mustang, does anyone know what the small deposits on the ground straps are? Only in the car for about 30 miles and 2 passes, have never seen that before.

 

[Chuck Leeper]

Burning e85, or???

 

[87gninpa]

Nope, just 93. 2011 5.0 with 76mm Precision, 8 psi.

 

[BEATAV8]

looks like it's just burning the zinc plating.