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I get 40-45 mpg in the '85 Si, ? in the HF (speedo is broken, among other things). I brought the Si's mileage up from 35 when I bought it by doing a few tricks.

1. 35 tire psi all around
2. HF 5th gear
3. Removed pass. side mirror
4. Gutted interior (carpet, panels, sound deadening, etc)
5. Tune-up w/ timing
6. Intake, cat-back exhaust, need a header/new cat...
7. A/C belt removal (soon to be entire A/C, with sunroof not far behind)
8. Easy on the pedal...

That's the majority of efficiency mods, probably more if I think hard enough. Mak
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