You guys crack me up! I was just saying synthetics have been proven many times over for their application and success. As for testimonials and actual experience with owners...I've spoken to many people who have used synthetics with tremendous success. Even individuals who have gone on the 25,000 mile drain intervals with regular oil filter changes and have vehicles with extremely high mileage on them. These are the individuals who first got me interested in AMSOIL and other synthetics. Not a "lab" claim. I never buy any product based on what the company claims it will do.
As for switching to sythetic past the 20k mile mark, I've talked to several people and have read up on this and it seems like it's OK. As for the engine seals leaking, I know this will happen if valve seals and gasket heads are not in good shape. However, I have plenty of confidence that my engine is still sound and running great (I hope, Toyota

). So this shouldn't be a problem. Especially with a much newer car and engine. Even AMSOIL states they do not recommend running their oils in non-mechanically sound engines.
Regardless of all this talk you all will swear and go by the oil you use just as others will theirs based on personal experience and information we've recieved. If we didn't we wouldn't have such strong opinions about the products we use and how we feel about them. Especially here where people actually care about their cars and are willing to invest extra time towards making what they feel is the right decision. (you can tell by looking at this forum
btw- You all see The Two Towers yet? Just saw it tonight and it was awesome... thanks for all the input too- I really enjoy hearing what other people/owners have to say other than mechanics I don't know and what company reps & ads have to say.