Just had an 11 plate GSA loan bike while my GS was having the rear shock replaced. Ran out with 2 bars showing and 57 miles range on the display, and no yellow warning triangle. Put a gallon in and about 5 miles down the road the triangle came on! Then stopped and put another 3 gallons in. Still 2 bars showing, and stayed like this right until I gave the bike back. Bike had 3k on it. My bike is an 08 and the computer is actually pretty accurate. So far anyway. I don't take a lot of notice of it though, still do it old school style using the trip zeroed at every fill up.