It might.
I was getting up to 28 MPG on a full tank reading (several of them) with Granny before I gave her to my Father. We had an open element stainless mesh filter from APC, using a 45* generic aluminum intake pipe. the IAT was plugged in via a hole drilled in the intake pipe with a grommet in it, and the PCV line was just stuffed into a hole in the rubber coupler.
Even though your throttle body is probably an oval, there is an intake pipe adapter that fits perfectly. I think it's 3" against the TB. This gives great induction noise, but I can't say whether it will actually help or hurt FE. I assume it does nothing but make the car sound cool.
FWIW, 60* V6's have an annoying resonant tone in the exhaust. Get rid of that, and you're golden.
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