I have 96 neon with a big oil leak; it will loose about 1.5 litters of oil while driving at highway speed in one hours time. This happens when car is hot; when car is cold or driven under 5 mile very little leakage. The leakage looks to be from the crankshaft seal around the flywheel; not the head gasket or camshaft sensor or oil pressure switch. The car has 180,000 km on it. Has anyone seen or know about this problem.