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NASCAR's Greg Biffle on fuel conservation

Driver Greg Biffle discusses how NASCAR teams are dealing with the switch to electronic fuel-injection after 63 years of carburetors.

http://www.wusa9.com/video/1492043295001/1910326452001/NASCARs-Greg-Biffle-on-fuel-conservation http://videos.usatoday.net/29906170001/29906170001_1490329904001_th-1490325438001.jpg?pubId=29906170001 NASCAR's Greg Biffle on fuel conservation Driver Greg Biffle discusses how NASCAR teams are dealing with the switch to electronic fuel-injection after 63 years of carburetors. Greg BiffleNASCARsportsMotor Sportssports general 02:51

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