The Coefficient of drage for the Yaris is .29 which is great for an econo-box.
Sure this car is "plasticy" but I say it is refined because although the materials are not expensive, the car is built tight, no rattles, great fit and trim, and does not vibrate except for a suble vibration when one puts a big load on the engine, which I almost never do for better MPG ;-)
It drives like a car much bigger then it looks. Inside it is very simple, pragmatic, utilitarian, and minimalist in design. Beautiful simplicity.
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