I Don't Think My Yaris Has DFCO

[BailOut]

Originally Posted by CASTREX

So it's Toyota recommending low tire pressures for us to get bad MPG ??

Toyota recommends a tire pressure based solely on ride comfort/smoothness rather than anything to do with mileage or handling.

The recommended 32 PSI is one half of the reason the Yaris feels like it's rolling laterally sometimes, especially in corners or high winds (the other half is the suspension). This is also one of the main things that leads to all the complaints of crappy and sluggish handling.

With the tires at 44-60 PSI there is a noticeably rougher ride as evidenced by slightly feeling a highway concrete joint in your seat when you used to just feel it on the control surfaces but that is a very small price to pay to get an MPG boost and much better handling.

For example, on the downhill side of my commute home there are 2 tighter-than-usual right-hand turns. They each have the warning signs for 30 MPH and back in my 32 PSI days I used to take them between 25 and 35 and could sometimes feel a little slippage. Now at 60 PSI I blow through there in a 5th gear DFCO at 45 MPH without so much as a tire squeal or wobble.