Due to tight finances and a bunch of Weddings I have to get tux's for I will not be able to use synthetic oil year round.(Sorry for run on) So I am going to try to run conventional oil most of the year and run synthetic dureing the long winter. I am going to try Chevron Supreme as it has been highly recomended. I intend on haveing terry read a sample after the "Toyota Recomended Service Interval". I am going to try the 4 month or 5000 miles recomended by the sever service schedule. If this new Toyota chews it up we will know that it is a sludge monster as well! This plan could change though as weddings and bachlor party exspenditures are hard to anticapate. If I have some extra money I will of course get back on the synthetic bandwagon! I am going to predict that this engine is going to tear dino API rated oil's to shreads!! I will not be useing any oil additives like LC,131,132, or oil extreme this time around. I want to see how the oil is going to hold up in this application.