Considering Yaris vs. Elantra

[voodoo22]

For your mostly highway driving, you will in fact get worse fuel economy with a MT unless you do pulse and glide, which involves putting the car in neutral, shutting off the engine and coasting down to a certain speed before you start up the engine again.

Not as bad as with the Fit, but just like most cars nowadays, the MT's rev higher at hwy speeds and unless you're doing a lot of city driving where shifting properly can save you big, you will in fact get less MPG with the Yaris MT vs the AT.

I would have still bought a MT if it wasn't for my wife wanting AT (I personally prefer MT over AT), but don't discount marginally better hwy FE and never worrying about shifting in the AT.