went to walmart today, which is about fifty miles from my house. on the way there the car started burning oil, I could see darker colored smoke coming out my exhaust in my rear view mirror. by the time we got to the store the oil light came on, so I checked to see how much oil was in the engine. dipstick said empty. so I bought 2 quarts and added it and drove down the street and the oil all leaked out. could be a pcv issue or a gasket could have failed. I recently put an xp cam in as well as a set of heads. I've been having issues with the pcv, but I thought I had it fixed.