I changed the oil regularly in my TC but the oil light began coming on at 90k and my mechanic said that the oil pressure was probably low. Before I could get it to the dealership my engine failed due to a broken cam, dealer said they will not cover it due to sludge in the engine, I changed the oil regularly but Toyota does not care! Called corprate, they said that there's nothing they can do. Do not buy one of these cars! This run of engins are junk!