oil change mistake (?), friend's 96 gt Options

[Corvius]

A friend of mine recently bought a 96 gt (I didn't coach him on the buy, you'll see why in a sec...) with just over 100k. Went over to his apartment the other day to check it out, 5speed felt fine, fluids seemingly in good order, idle was fine...etc etc, nothing noticable from just driving it around. When we got back I got down on the driveway under the car...and here's where my question starts: under the engine (at the end of the front underbody cover/about in line with the wheels)...it looked like it was splattered with --well i guess it was--oil sludge. Drew dipstick, everything looked ok. He just had the oil changed at a local shop, and going over the papers the previous owner gave him I discovered the oil hadn't been changed for at least 9000miles. This is kind of a hodge-podge description, I didn't have my camera with me or I'da taken pictures of the stuff underneath the car (there were some small drips on the driveway right under it). I guess my questions are: was this oil sludge? did it have anything to do with the car's history? if it drives fine should he worry about it? Any input would be great. thankya guys.