I have the same car w/ the same issue (except no coolant in the oil and check enging light is not on). at completely random times, it will lose power, coast to a stop and then i'l have to wait a few minutes, then the car will run like nothing happened. i changed the oil, replaced my fuel, air and oil filters, and ran some injector cleaner throught the gas. my car was problem free for a week or so, and it strated happening again. any sugjestions?