BTB Party Bus runs on churro power… or what they were fried in

Party buses in Ann Arbor are are turning to clean fuels –like used vegetable oils– to transport revellers.Excerpt:BTB Burrito is already Ann Arbor’s go-to spot for bar-goers who crave a late-night snack after last call. Now, BTB wants to give them a ride home, too – on a shuttle bus fueled by the waste oil that their churros were fried in.The BTB Party Bus – a bright-red, 14-seat, former airport shuttle – is powered by a diesel engine modified to run on used vegetable oil. It’s indistinguishable from a normal diesel shuttle, except for the 20-gallon tank of grease that sits behind the driver and the tortilla-like aroma that lingers near the tank and emanates from the exhaust pipes. The homegrown mini-chain has been known best for fast, inexpensive Mexican food and a decidedly Ann Arbor attitude, from its funky interior design to its line of Hash Bash-themed merchandise. The turn toward eco-friendly transportation stems from the owners’ interest in green innovation.Read the rest of the story here and a story on Ann Arbor’s two electric cars here.