The Polk County Sheriff's Office expects to save more than $20,000 annually by running 10 patrol cars on propane autogas. The fleet conversion began in March 2013 and recently completed. The Sheriff's Office converted seven Ford Crown Victoria's, two Chevy Tahoe's, and one Ford F-350 pickup with the Prins VSI bi-fuel autogas system through the Alliance AutoGas program. Auto Additions of Salem performed the vehicle conversions, while Blue Star Gas furnished the autogas fuel station and delivers year-round fuel supply.
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