30 Oct '14, 1pm

Study: Propane buses can cut fuel, maintenance costs in half #propaneautogas #maintenancecosts #altfuel

I worked on this case study and yes the fuel economy results were surprising. Though to be clear using 'gallons' can be confusing so we need to specify when trying to understand fuel efficiency, e.g. 4.5 miles per propane gallon ~ 7 miles per diesel gallon equivalent (DGE). As we explain in the document, we were not able to compare the exact same engines on both propane and diesel, rather were looking at the diesels being replaced and the new propane engines. So not apples-to-apples (age, performance, emission certification) but they were similar displacement. Unfortunately there has not been a lot of fuel efficiency analysis done on propane engines, though I would agree depending on the duty cycle the fuel economy of a propane vehicle will be likely be 10-20% lower on an energy equivalent basis than its diesel counterpart (with potentially some performance degradation as ...

Full article: http://www.schoolbusfleet.com/channel/bus-maintenance/new...

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