Fresh from ditching its collaboration with Mercedes-Benz on BLUETEC diesel technology, Volkswagen will be showing its newest economical diesel offering at the Frankfurt Motor Show next month – the Golf BlueMotion. BlueMotion is VW's own line of ultra fuel-efficient cars, and the Golf qualifies by achieving 52.26 mpg, or sipping 4.5L of diesel fuel every 100 kilometers. The darn thing can go 745 miles on a single tank of diesel!