Hi Graham
I went on a run today and the gauge dropped to nearly zero! And the trip was on 176 miles. On return I decided to have a fiddle, and after just moving or trying to push the cable connection in the gauge and the needle moved to around the I/4 mar.
I worked out 12 gal x26 = 312 so I should have 136 to go before I run out I might take it to 100 and refill any thoughts
Regards Martin