Petrol stoves should be used with "white gas" if possible. Car fuel works for a while, but the additives in it clog up the generator tube and jet after a while. Then you've got to clean it out. Some stoves are easier than others - you could have to replace the generator tube.
Coleman fuel is the normally available version of white gas, but there's also a Primus Powerfuel. Cheaper alternatives that you may be able to find locally are
Aspen A4T or panel wipe (spray paint prep).
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To get good power from a gas stove to the end of the canister you need to send liquid gas to the burner, requiring a preheat tube in the flame and an invertible canister.
If you burn gas, you burn off the propane part of the gas preferentially so by half way through you will be burning pure butane. Butane has a boiling point of about zero, so below that you get nothing, and if it's not very much above you don't get much pressure, then the evaporation of the gas cools the canister and you get even less.
Burning liquid fuel uses butane and propane in the same proportion as in the gas mix, so you get no change towards the end of the canister. You need to start the stove with the canister upright to get the preheat tube hot before turning the canister over and adjusting the flame. You need some propane for this unless it's reasonably warm.
I use an
Edelrid Opilio - light, a swivel on the hose so you don't twist it turning the stove over, and a control knob that is reasonably easy to use on an upside down canister.