Ooh, I think I know this one too.  ;)

I just bought a new fuel tank, and the label said "60l", or 15.8gal.
I recall seeing a 15.3 gal fill recently when I was very low, so that
all seems about right.

While we're on gas tanks, is anyone aware of any upgrades to the gas
gauge system?  With the flat tank and sender float at a corner, the
gauge moves around a lot as the fuel sloshes around.  If there were a
more precise system, I'd be able to drive with more peace of mind and
fill up less frequently.

Alex