2002 Jayco Outback Finch 3 Way Fridge

The sensible ones dont.

What happens when you go into a servo with a lit flame.

Think about it.

Can be risky.
Whilst travelling it is appropriate to run the fridge on 12v with that the caravan or trailer 12v connected to the tow vehicle. The car's alternator then supplies all the power to the fridge.
When the vehicle is stationary for any length of time the fridge should be changed over to gas to avoid discharging the battery.

There was a series of pictures a few years ago showing a Land Cruiser being destroyed from having a gas fridge going in the back with the car closed up.

I also vaguely recall some instruction for wind up campers never to run on gas with the camper closed whether moving or not, due to heat build up and lack of ventilation. Eg when parked and the occupants sightseeing.

Regards Philip A

Don't risk yourself or anyone else.

Crusier 91 - There are no specific laws about running your fridge on LPG whilst travelling.
However, there are "safety recommendations" based on the potential risks involved in doing so.

The recommendation is to turn off all gas appliances and close the taps on LPG bottles when travelling.

The safety thinking behind this is simple. Road vehicles do crash. You can be hit by another vehicle when you are doing nothing wrong. In a crash, a damaged LPG line and a gas bottle tap left on, is going to fuel a serious fire.

Service stations and fuel depots require you to turn off your LPG appliances before refuelling. Are you going to remember to do this EVERY time you refuel?
I've seen the Mobil fuel depot in Norseman burn to the ground, a total loss, in 1975.
It wasn't a pretty sight, and it endangered the whole town.
The fire was started by a caravanner leaving his LPG fridge going when he refuelled at the bowsers inside the depot (fuel depots have now relocated all bowsers outside depots to reduce the fire risk).

On rough roads, LPG lines have been known to fracture, and LPG connections have been known to rattle loose (I have known one bloke who lost an entire 9kg bottle of gas when his threaded connection came unscrewed on a rough road).
A leaking gas line is a potential fire and explosion source. If you have the tap on the bottle turned off, the potential risk is reduced.

A fridge flame can blow out, particularly when hit with a wind blast from a passing semi travelling at high speed. It's bad enough that you could end up with spoiled fridge contents - but you are also reliant on your fridges gas cut-off device working properly when the flame goes out.
If the gas cut-off device fails, you end up with a caravan full of highly explosive gas that can be ignited by the slightest spark - just a static spark from clothing will do it.

Working with and using LPG is all about managing the risk of leaks, and the subsequent risk of fire and explosion. The more steps you can take to minimise the risk, the safer your holidays will be.
Being burnt by a gas leak, or being caught up in a gas explosion isn't fun, believe me.

Cheers, Ron.