Most fuel efficient sub compact automatic

[niky]

In city driving, the 1.3 liter engines in the Vios and the City don't seem well suited to the drag of the transmissions. Some even claim that they drink more gas than the 1.5 ATs, though when I've driven them, I found them to still be slightly more economical. It all depends on driving style. Suffice to say, they're not the most economical picks amongst your choices.

The Mirage CVT is pretty good, and it's a light car, so economy is decent even with the auto in traffic.. The Accent diesel is pretty decent, though I haven't driven it in heavy traffic, so I can't comment on city use.

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And GH makes an excellent point. With what the Mirage GLX CVT costs versus the Accent diesel, you can buy a whole crapload of gas.