[FWB]

yes, i used it around ports and around the coolant passages and yes it is fuel resistant, diesel is like kerosene it is a natural solvent. some of the surfaces on the diesels don't even use gaskets, just the sealer. ask yourself this....
does the pan leak? i've tried several gaskets and about 5 different sealers. from rtv blue, black, red. permatex 1, 2, high tack, plus several no name canned silicon. the ford stuff wins............