my sister finally bought a decent car,,, it's a 2000 sienna with the v6 engine,,,you know the story of this engine,,,I changed the oil two weeks after that with supertech conventional,,, and 2k miles later I did it again,,,this time with castrol edge 0w-40,,,,olso replaced the pcv valve wich became a nightmare,,,,{the [censored] grummet made me replace the overdue valve cover gasket),, I have some pics,,,but my questions are: pennzoil ultra or M1 HM ,,,and I can't find out if this is an interference engine