I Don't Think My Yaris Has DFCO

[BailOut]

I hear you, CASTREX, and all I can say is this:

1) None of those articles ever took rolling resistance into account.

2) None of those articles looked at actual tire longevity.

3) These articles are usually written by the same folks that swear to this day that you absolutely must change your oil every 3,000 miles when Toyota says 5,000 - 7,500 (depending on the engine) and extended synthetics say 12,000 - 15,000.

4) Very few writers, or the organizations behind them, do their own science. They simply mimic what has been published elsewhere.

5) Don't forget that pumping the tires up higher greatly extends tire life so it goes directly against the interests of tire companies, tire sellers and tire installers to have you use a higher PSI.

6) Try it for yourself rather than letting others make the decision for you. However, if you don't want to pump up your tires you certainly don't have to. Like all other hypermiling facets it is left to personal taste.


Just know that Prius owners typically run around at 42/40 PSI on tires that are listed for 35 and several of us on CleanMPG.com are running around at 50+ not only without problems but with many tangible benefits.