Tyre Pressure Prius 2013

Your mechanic is correct in saying that less air pressure will lessen the strain on suspension parts, but you need to balance that advice and your smoother, quieter ride against a few other things, such as the added fuel cost and of running on lower pressure, the possibility of uneven tire wear (shoulders wearing out before the center), and mushy, less precise steering which can be hazardous. There is no doubt in my mind that any Toyota engineer will tell you to use the exact pressures that are printed on the driver's side door plate. These numbers are very specific to your individual car and they account for any factory options that the original purchaser may have chosen.

 

welcome!
you want to feel the road? try 42/40 after awhile, when you go back to 35/33, it will feel like you're riding on air