Lest anybody be concerned about their Prevost in cold weather we spent about 36 hours driving and stopping overnight when the lowest we saw was 26 below and the high for the time period was 21 below.

Gelling was not a problem, but we never turned it off so the warmer return fuel probably helped maintain warmer fuel temperatures. The bus heating system was excellent when parked with it on high idle (we never shut it off), but with the bus heat on its highest setting, the defroster fans going as fast as they could spin, the generator running so we could run the electric heaters up by the entry door we still froze our butts off when driving due to the cold air spilling down from the windshield that was being cooled by our 60 MPH wind chill.

If you ever experience sub zero temperatures just keep the bus running and I do not think fuel gelling will be an issue even if you have pure #2 in it.