how is the valve cover gasket? mine has started leaking on the backside above the oil filter and smells when the engine is hotter after acceleration

also, when you are at wide open throttle the engine goes into rich mode an disregards the o2 sensors. this in combination with high revs, high temp, and slightly floating valves the engine is allowed to burn some oil. the reason why you would be smelling it? check the trunk gasket. at speed vacuum is created behind the car so exhaust can be sucked into the cabin.