I recently completed a head swap- a 99 head and intake manifold (with Summit Racing rev switch to control the VICS butterflies) onto my 97 with manual transmission, AC and P/S, along with a Begi coolant reroute, timing belt tensioner and idler, front main seal, all new hoses and CAS and cam seals,99 fuel rail and injectors, and a Protege valve cover. I also installed ARP head studs. I bought the head used, and had it hot tanked with a valve job, new 949 Racing seals, stock 99 exhaust cam and MSM intake cam. My engine had previously used no oil and ran strong, so I didn't do a compression test. Now I am losing oil somewhere (Mobil 1 10W-30) at about a quart in 150 miles with no external leaks that I can find. My tail pipe is black and oily. I'm thinking of pulling the top off of the intake manifold to see if itps oily inside (I also removed and blocked off my EGR). I'm wondering if the culprit might be something to do with the Protege valve cover. I installed a new Pcv valve and ran the vent from the back of the valve cover under the intake manifold to the stock connection on the intake crossover. Any ideas?