Large uplift
they use less than the big boys do taxing.
Max fuel is between 1200kg and 1500kg and its not uncommon to start off with less that 800kg.
They burn about 6kg a min.
As for the S.G this can a problem even if you get given one by the bowser man. The S.G tends to get taken early morning. And you have a special bowser that can do over wing fueling. So it can sit out in the sun all day until you refuel. Which is why a lot of us use an SG of 0.77 when ordering. A 500-1000trs is the normal uplift at a time so its won't give you that much extra over. Most of the modern TP's have pressure refuelling and the units I have used anyway pull 50-75kg of it initially which calibrates the S.G. before pulling up to the weight in the panel. And a cross check against the bowser S.G. is usually within 0.01 which would be normal for a bulk to bowser temp rise.