I am going in for the 1 year maintanance on my IS350, what should I ask for them to do, I don't want to say "rape me, I am here for 1 year service", any advice would be appreciate it, also would this be a good Idea to use synthetic oil? should I buy my own synthetic oil and bring it to the dealer? please help thank you, I do a lot of freeway driving for the most part, not too much stop and go but some. thank you in advance.