OK,I've read this board for years, but now I have to speak up. I have TWO Prius's. A 2001 and a 2005. Both have been fed an exclusive diet of Rotella 15w40 since new. The 01 has 130k and the 05 just hit 200k. Mileage is in the low to mid 50s with each. Engines are as quiet as new and no repairs...