Since I owned 06 ES330, I had follow the 5000mile service shedule in dealer. Each time I have to pay at least $100. But I only need to do oil change when I owned my Acura TSX every 10,000mile, which you pay only the fee to change oil. Do we have to do the servie every 5000 mile to keep the warranty valid? Or we can do a minimal oil change? Thanks!