Tires--EP422

Ouch! Have you had the car aligned recently?

 

How many miles on the new tires? Maybe after alignment and some tire wear it will improve?

 

Brand new tires will sometimes do that because of deep tread and not being fully cured. After a couple thousand miles they start acting normal. Unless you have a defective tire.

 

The sidewalls are fairly soft on the EP422, see alfon's recent post about the wandering on the highway. The Energy Saver A/S does the same, and it worsens as the tread wears down.

From what I can tell, the only tires that the seem to deliver strong fuel economy while maintaining "safe" straightline stability are the OE tires. Anything else either compromises fuel economy or traction/handling.

 

The Michelin Energy Saver tire is a superior tire to the Ecopia EP422. The
Ecopia's seem to drift especially at 65-70 + mph speed. The sidewalls are
much softer it seems than the Energy tires.

I plan on returning them back to Costco, 30 day money back guarantee, and getting 4 new Energy Saver tires.

My Energy tires had 68,000 miles when I purchased the Ecopia tires. Even with
that many miles they seem to handle and ride better than the Ecopia tires.

The Michelin Energy gets 2-3 mpg more than the Ecopoias as well from
my findings.

 

I replaced my oem's with Continental ProContact EcoPlus and have been very pleased so far (6k miles). I did notice for the first 2-3k miles that my mileage dropped by 2-3 mpg and there was a 'squirmy' feel to the tires, although they felt very secure in turns and on wet roads; they are also quiet. Now that I have more miles on them the squirmy feel is gone and my mileage is about where it was with the original eom's, i.e., around 52 mpg all-around. I don't know about your Ecopia tires, but perhaps they will settle in after a few thousand miles like my Continentals did.

 

Yes, new tires need to brake in some, but it should take a couple of hundred miles at most. If sidewalls are too soft, more pressure should fix it.
OP: what pressure do you use?

 

It is unacceptable for these tires to not perform at their full potential at the Toyota recommended pressures. Period.


iPhone ?

 

I don't think so. I stopped using "Toyota recommended pressures" in my cars many years ago as I was fed up with mushy tire response and poor cornering. Higher pressure fixed all those problems.