I am thinking to switch to synthetic oil for my 2007 Sienna. I drive less than 10K miles a year. I am currently doing the oil changes on every 6 month interval (I don't hit 5K during 6 month period). So to me the one of benefits of switch synthetic is that I can push the oil change schedule to a year (instead of every 6 month). But that what about the oil filter, can it live up to the new schedule? (I don't think 3rd party oil filter is an option, as the Sienna 2007+ uses paper type filter.).