Tire Pressure - Factory Defaults and MPG Comparisons

Okay, I've had my Prius over a month now and I checked my tired pressure yesterday. The first thing I noticed was how low the factory default tire pressure must be. My front Tires read 36 and 35 and the two back tires read 32 and 34. Judging by this, I am guessing the factory default is 36/34, or thereabouts.

Does anyone know what the factory defaults are?

Knowing that I have been getting around 60mpg the last two weeks or so, I am going to raise my tire pressure to 40/38 to see how my mileage may change to do some testing myself.

I am wondering if any detailed analysis has been done comparing the relation of MPG and tire pressure. I know that many have said their higher tire pressure has resulted in higher FE, but I have not seen any graphs or reports on this topic in detail.

 

<div class='quotetop'>QUOTE(Malarkey @ Aug 15 2007, 10:49 AM) [snapback]496106[/snapback]</div>

Thanks Malarkey. I too plan on watching the pressures much more frequently.

Makes me glad I don't have Nitrogen filled tires, otherwise I would be at the dealer's mercy to fill them up when they start getting low.

 

Thanks Jimbo! That was some of the information I was looking for.

And yes, I am about 20-30min from you from the sounds of it. I sent you a PM on GreenHybrid earlier today.

Given the figures you posted, at 5.5% it should increases my FE from 60 to about 63.3. That makes a difference of about 40 extra miles distance on the tank.