Craig,
I fueled several trucks every day w propane and didn't consider it a PITA. I was used to it though. And getting payed for it. CNG IS a PITA as far as I know. Not practical unless you have an active fleet of vehicles.
Big Jim I remember the octane part. Propane converted gasoline engines require much more ignition advance except for the very top end and there a few degrees retarded is usually called for.
Before Gasoline fuel injection the thing I liked best about propane is the way the engine ran when it was cold. For about 2 years I not only drove trucks on propane but my personal vehicle was on propane too. Got 98% of my propane from one source and only once did we need over $100 to pay the monthly bill. That was in the mid 80s and I drove a lot .. as I do now.
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Eric
North Western Washington State USA
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