Lexus wants almost 300$ for the 16k km service. Looking at it, it's really expensive considering the only materials are the oil and filter change. Everything else is inspect belts, turn signals, wipers, etc and and rotation of tires. I'm considering, from next most expensive to least: going to a local Toyota dealer, a Mr/Lube/Canadian Tire, or just doing it myself. Any recommendations? And synthetic or conventional?