Does anyone know for sure what oil Acura puts in at the factory? My sister was at her dealership this weekend and a salesperson ( I know, there's the problem) told her they put full synthetic in her 07 TSX at the factory. To my knowledge, the RDX is the only one in their lineup receiving synthetic at the factory. If anyone knows, please chime in! I tried searching and it popped back over 500 threads.