Iowa Energy 500 Fuel Efficiency Challenge

At the 1980 Iowa State Fair, a number of inventive Midwestern mechanics and tinkerers entered their modified vehicles in a fuel efficiency contest.



066 iowa energy 500 fuel efficiency challenge - starter's flag
Iowa Governor Robert D. Ray kicked off the first annual Energy 500 fuel efficiency challenge by dropping the green flag for the competitors in the initial heat.
PHOTO: MOTHER EARTH NEWS STAFF
066 iowa energy 500 fuel efficiency challenge - v4 conversion
Waverly, Iowa's Earl Mason realized a mileage increase of about 40% after he converted his V-8 Buick to a V-4, using MOTHER EARTH NEWS'. 
MOTHER EARTH NEWS STAFF
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The open class featured vehicles of all kinds, including an ethanol-powered BMW runabout sponsored by Sun-Syn Research of Chicago. 
MOTHER EARTH NEWS STAFF
066 iowa energy 500 fuel efficiency challenge - modified AMC Gremlin
R.F. Kuecher of Palos Hills, Illinois achieved an impressive 41.65 miles per gallon with his diesel-equipped — and partially waste-oil burning — AMC Gremlin.
MOTHER EARTH NEWS STAFF

















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