My engine is pumping a lot of oil out the dipstick tube, about 1.5 qts for a 20 mile drive. I did a compression test and the #3 cylinder is way low. How do I tell if it's the head gasket or bad rings? I'm guessing if it's bad rings the cylinder wouldn't build enough pressure to cause that much pressure in the crankcase. So I'm guessing the head gasket is leaking the compression into the crankcase. Does this sound right?