Now you've got me worried!!
I've read a one or two posts during my search of guys who have reported the same thing, while others said there's was clean. What's going on, could this be a fuel choice issue? Or just dirty filters?
I've got some pics of the inside I'll put up later, I stripped mine out for painting last week and was a little supprised how dirty it was, but a bit of machine cleaner and elbow grease worked a treat! Its definately oil residue for the most part, I'll be investing in a catch can as soon as I find one that works properly and won't need me to remortgage to afford it.