Temperatures in the 20s (below zero Celsius), caused four buses to stall in a single day leading to the suspension. The Gloucester County School Division has been an enthusiastic proponent of biodiesel and is now researching how to get their fleet of 117 buses back on their usual biodiesel blend. It's thought that in cold weather the biodiesel may not mix as thoroughly with the petro-diesel leading to a higher chance it will attack and break down older, rubber components in the fuel system. Rubber was found in the clogged fuel filters.
[Source: Daily Press / Mathew Paust]