Call your local Toyota dealer and ask for parts. Our toyota dealer here in town stocks the full synthetic 0w-20 oil. I bought some with a oem filter for my first oil change which may be a few weeks away. The oil comes in a red plastic quart containers.

Could be in 2009 when more hybrids come out by other manufactures, we should see 0w-20 synthetic oil in most all auto stores.

The local toyota parts man once told me he thinks the toyota synthetic oil is the same as mobil one. I paid just under $5 per quart but some say in the forms, it cost more lately.

I read somewhere that changing to synthetic oil can increase your gas mileage by one mpg. Might be a their is a little less wear with it in the crankcase.