Originally posted by Two Lane
Picture this...the propane line runs from your trunk to its dispersion point at the front of the engine compartment , which is vulnerable to side and/or front collisions. ( The injection points for both alcohol and propane are within inches of each other. )
In comparison the propane tank in the trunk would seem to of lesser risk of leaking upon impact. Keeping in mind a common propane tank location being almost under the rear speakers, the gasoline tank would therefore likely be destroyed in a rear collision first.