altho I havn't "modded" my classic prius yet,
I have modded my garage, and picked up a car that gets double the mpg of its stablemates
I paid $2200 for the car,
and it should pay for itself in fuel savings in about a year of driving my 120 mile/day commute
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2005 GTO 6.0 V8 (600hp)
1991 Geo Metro 1.0 3/5 base
2010 Prius II (replaced 2001 Tahoe 5.3 V8 April 2014)
1994 F-350 7.3 TurboDiesel (Rollin' Coal)