Regaining lost MPGs

[DaleJrDolphins]

Thank you barryware. I will have that checked. I was thinking that the more likely case was the cat conv and muffler getting older and blocked up but didnt want to lead the conversation down a road intentionally....wanted to see where it went naturally.
In the case of the tires though...i have been watching for even wear and it "seems" that they are wearing evenly. The other thing that made me thing exhaust system was the somewhat small shuttering with the engine/exhaust that I hear/feel....but thats mostly when its colder outside. Any thoughts to that?

[barryware]

Originally Posted by DaleJrDolphins

<snip>
In the case of the tires though...i have been watching for even wear and it "seems" that they are wearing evenly. <snip>

Unless your alignment is really out, you won't really see it in the tires if you rotate them often with a light car like the Yaris. I rotate my tires every 7500 miles.

My steering wheel was straight and the cars handling was tight. When I felt the tires with my hand (after a couple hundred miles down the highway), one was much warmer than the others..

The fronts were warmer than the rears (as expected) but the fronts seemed equal in temp. The rears were not equal.

That could also be the result of diff tire pressure but when ever I set out on a few hundred mile journey among other things, I always check the tire pressure so that should not be an issue.