Good find, the resource I found earlier: http://toyota.custhelp.com/app/answers/detail/a_id/7604/~/what-are-the-oil-change-intervals-using-synthetic-oil%3F http

Good find, the resource I found earlier: http://toyota.custhelp.com/app/answers/detail/a_id/7604/~/what-are-the-oil-change-intervals-using-synthetic-oil%3F http://toyota.custhelp.com/app/answers/detail/a_id/7604/~/wh... did mention "extensive idling" as "Special Condition" but did not mention "and/or low speed driving" and associate it with Police or taxi service. Of course I take back what said before, always do what the Toyota engineers recommend.