Ok, where to start. I have another leak in the valley. It is black and looks oily but smells like fuel. I am low on oil but have a valve cover leak and I blame that. I get decent fuel milage about 15-17 in city but 15 on highway. It seems like at 2000 rpms or greater the truck looses alot of milage and I don't see why. But back to the main issue, I replaced the fuel filter housing and that stopped all the leaks a few months back, then I had a really bad fuel leak again so I replaced the fuel pump, with new crush washers and all, and that fixed the issue again. But now its back and worse than ever, I loose about 1 gal of oil every 1,500 miles. It smells really bad inside the truck but I think thats that valve cover too. I was thinking I might have done something wrong when I was installing these but that was about 6 and 9 months ago and never an issue since. I was kind of thinking HPOP or a bad hose somewhere but I am at a complete loss.