SYNTHETIC OIL : full and blends > made decision

decided to go w/ full synthethic for the 2000 PRIZM ( Corolla ) . REASON : 1.) looks like many of the manufacturers are fading out blends which will become hard to find , probably due to the $ to be made on full synthetics . 2.) technician stated most syn-oil blends or conventional oils use parrafin ( wax ) , less likely to be found in synthethics 3.) better heat dispersion ( temperature gage is the proof since change to syn-oil ) 4.) cleaner : so less build of deposits in pan and upper engine , assume less acidic as well , so better for more idle engines , such as the PRIUS . 5.) little better mileage as well . Therefore am more convinced to go to a full syn-oil in the PRIUS for these properties as well as being only a 1.5 ltr engine in a 2,900 lb. car in very hilly terrain ( have noticed high engine noise on steep hills , more I.C.E.) , very hot muggy summers , brutal cold , etc.. HOPEFULLY WON'T CHANGE MY TUNE . To each there own . Thanks