Refillable gas bottle

[Geek]

Before you next fill up, check what the gauge says. Ideally, weigh the bottle using bathroom scales or a digital luggage scale.
Then when it is full, read the gauge and ideally weigh the bottle again.
It would be interesting to know how the gauge readings, weights and weight of LPG added correlate to one another.
A litre of LPG weighs half a kilogram.

 

[Molly 3]

The dash gauge on my underslung tank is incredibly useless ,

 

[HurricaneSmith]

Some time ago I thought my dash guage might be faulty, and so I clambered underneath and removed the underslung tank's protective red cover. Inside was a previously hidden factory guage, and it showed an identical reading.

So I stopped worrying, and moved onto the next problem I'd invented.

 

[Geek]

The dash gauge on my underslung tank is incredibly useless ,

The one in my van has four green lights when full.

In winter, with the heating on 24/7 the fourth goes out after about five days.
The remaining three go out, one at a time, at about eight or nine day intervals.
Then when the last one goes out, a red light comes on. That means you need to refill within a week or so.

I'm not sure about that, because I've never actually run out of gas yet.