Isx 870 with 1.2 million miles 05 international

[Waterloo]

One thing I did when my front top cover was leaking, was to go get a dozen bottles of the UV Dye for oil and a cheap UV flashlight and glasses. I found my leak, and it surprised me, it was not where I expected. May be worth a shot, pour all of the dye in and run up to the truck stop or store and back, say 30-40 miles, get her in a dark garage or wait until it is dark out and search for the leak with the blacklight and glasses. The dye don't lie.

My local NAPA, AutoZone and O'Riely's stocked the dye. I cleaned them all out.