For 15k, ask for oil change min. Rotate tires optional(not too bad if not, it was rotated at 10k). Decline others. If Lexus service is too expensive, check Toyota dealer. I found local shops have almost the same price as Toyota dealer. Check your dealer website, they often, sometimes always have coupon discount for oil change, use it. If you don’t mention, you gets charged at full price. If this is still too expensive for you, change by yourself.