[elhigh]

I had the tires replaced on the rear of my Prius back in November, and then the fronts a few weeks ago.

The rear tire replacement eliminated an awful noise so that was a big plus, but had no effect on mileage. The lady behind the counter reported that the tires were "cupped," but didn't elaborate.

I don't know what the fronts are - I just told the guy, as long as they're black and round I'm happy. BIG mistake! Fuel economy is way off. It's always down some at this time of year because of the cold but there's more. Parts of the road where I could coast and gain speed, now I coast and lose speed. The new tires are the ONLY change that has been made. And I can hear these tires. They make a distinct noise that is brand new to the car.

I know it's been said here before, but dang does it ever bear repeating. Tires are HUGE in the economy game.

I may just eat the cost and get them replaced. It's so bad I'm demoralized to the point I have skipped several fuel log entries.