No offense, and it's your money, but the redesigned engines for 2010+ come with full synthetic and are rated for 10k mile intervals. Engine and oil technology has come a long way, and there really is no harm in going that long between changes if the engine's rated for it. Toyota is loosing maintenance money by going to 10k mile changes, so there's really no reason for them to do it unless the engine can handle it. Even my old 1996 Cadillac was rated for 7500 mile intervals...I went to get my oil changed today (4600 miles). They told me that it wasn't due for an oil change until 10k miles. I told them they can pay for and install a new engine when this one burns up.