It's time for my 1st oil change so I called the dealer that I bought my Prius from and asked a few questions about oil changes and they use CAM2 oil for the 2010 Prius. They said it is a 0W-20 synthetic. I think he also said they make it for Toyota as well. I looked at their web site and they make all kinds of lubricant products but I have never heard of them.
http://208.112.96.227/productbulletins/80565-CAM2SynavexMotorOils-PB.pdf It meets the Toyota requirement so, for me, it would strictly depend on the price. You can get Mobil 1 at Wal Mart for $6.27/qt, not including the occasional rebate. If the Cam2 costs more, I would bring in the Mobil1 and tell them them to use it instead.
