added air to my tires. - Toyota Yaris Forums

mark2908 · 10-31-2008, 11:13 PM

6,000 miles at 50 lbs. (so far) and all is well. This is a Fuel Economy forum.
Flame if you must, but this is standard Hypermiling stuff and is well tested.
The stickies in this forum call for increasing psi to at least the max side wall pressure. (44 lbs.) Cleanmpg.com says the same.
This has been discussed to death both places, and it is up to the driver to decide what they want.

Lower (recommended) tire pressures are quieter and smoother but increase rolling resistance and decrease mileage.
It's also more likely to wear the outside edge of the tread as the tire slightly deforms when cornering.
Increased pressures have far less rolling resistance and less road contact, so mileage and handling is better, but it comes at a comfort cost of a rougher ride, increased road noise and harshness.
Proven by Hypermilers to wear well over time. With less deformity when cornering, the tread actually wears more evenly across the tread.
Flame away

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10-31-2008, 11:13 PM	#15
mark2908 Drives: 2008 Yaris HB Auto Join Date: Oct 2008 Location: Tennessee Posts: 13	6,000 miles at 50 lbs. (so far) and all is well. This is a Fuel Economy forum. Flame if you must, but this is standard Hypermiling stuff and is well tested. The stickies in this forum call for increasing psi to at least the max side wall pressure. (44 lbs.) Cleanmpg.com says the same. This has been discussed to death both places, and it is up to the driver to decide what they want. Lower (recommended) tire pressures are quieter and smoother but increase rolling resistance and decrease mileage. It's also more likely to wear the outside edge of the tread as the tire slightly deforms when cornering. Increased pressures have far less rolling resistance and less road contact, so mileage and handling is better, but it comes at a comfort cost of a rougher ride, increased road noise and harshness. Proven by Hypermilers to wear well over time. With less deformity when cornering, the tread actually wears more evenly across the tread. Flame away