Propane-Powered Bobtail Back on Track

Tucker Perkins, chief business development officer for the Propane Education & Research Council (PERC), told BPN in mid-December that after resolving a few technical issues in areas such as engine calibration and oil leaks, the Freightliner S2G propane-powered bobtail was back on schedule for delivery early in 2014. A Thomas Built school bus is built on the same chassis, and the delivery date applies to that product, as well.



The bobtail—with a dedicated 8.0L LPG engine from a General Motors long block provided by PowerTrain Integration and a liquid propane injection (LPI) system manufactured by Clean Fuel USA—experienced some minor issues that caused a delay in its scheduled January delivery. Perkins told BPN later in December, however, that the issues were resolved and that the delivery schedule was back on track.



He added that the issues were minor, but he and the Freightliner project team wanted to make sure the S2G was a typical high-quality Freightliner product.



“We didn’t want to release an engine out in the public that we didn’t think was ready to hit the road, particularly knowing that these are going to be in our own industry’s bobtail service,” he stated. “If a check engine light comes on, it’s just a nuisance, but we didn’t think that was a nuisance our customers should have to endure. I’m comfortable we did the right thing.”