I am new to this forum but have a 2004 Rx330 with 100,000 miles on it and have used valvoline 5w30 since new with the toyota oil filter. I have decided to switch to valvoline maxlife synthetic blend for the next 100,000 miles to see how it does. Now after finding a post on this forum about how to do an oil change I am doing all my own oil service and today changed the differential oil for $6 versus the $100 the dealer charges. I bought a Motive brand fluid extractor and use it to change the trans fluid and p/s fluid so now I can do a complete full vehicle oil service with filters for $49. Much better than the $400 dealer cost IMO. :D