Originally Posted by hyperion
There are several dozen recent threads on Prius and oil. I hesitate to mention that the 06 Honda Civic hybrid specifies 0W/20 wgt oil only to increase MPG. Combine that with a half quart low quantity and you may squeeze another couple miles per gallon.
Would mileage and performance in the Prius be enhanced by using 0W/20 or 0w/30 oil?