Poor Mileage Since Oil Change

[ETP]

Originally Posted by ETP

This is a common problem. Check the air in the tires and be sure the next time to take your own oil. I had a Honda dealer put 5W30 in my 2003 and I dropped 10 MPG. I took my 0W20 the next time and the mileage went up. 0w30 is good to go for the Prius as is says on the can good for all 5W30 and 10W30 appilcations.
They probably put bulk 10W30 crap in your Prius and set your tires to 32PSI

They did this to me at my last oil change on my other car at the dealer. When you can't see the service shop (Wal-Mart has a window) they could do anything to your car and you would never know. I do not trust mechanics that droped out of High School because they were trouble makers and then became an oil changer as a last resort job.