Very useful information. In Australia, many cars also run on LPG. Although there are regulations about who is allowed to service LPG systems in cars, there are some home mechanics who ignore this and do it themselves.
Not so long ago, a car LPG tank was drained in a shed and the fuel was ignited by a refrigerator at the back of the shed. Two men were killed and a young boy badly burned.
Like so many accidents, this one was avoidable.