When the local Propane co. was locally owned, they used it in their delivery trucks. Over the 40 years I had deliveries here, never once heard of a complaint, nor truck no show, or late delivery due to truck problems.
I had a Propane tractor and was very dissatisfied with handling/using the product for farm use. However, before Diesel became popular, farmers were fed the Propane propaganda (1st hand account of one farmer) so there were a lot of PG tractors. Have known of a handful of P/U owners having it and no real gripes....to which they would own up!