Does anyone have any idea why Toyota just added for the '07 model year piston oil sprayers to the 2AZFE (Camry and Scion tC 2.4L 4cyl engine)? What problem has the engine been having that they are trying to solve? Is if for lubrication, cooling, or both? Does anyone know of any issues with this motor other than the spun #1 cyl bearing issue that has been cropping up -- which I can't see adding piston sprayers would help? Also, where are these sprayers, and what exactly are they spraying at?