WORK IN PROGRESS ...
This page is getting ready for the public 1.8.2 release. Until the public release you can use new cost, fuel and driving range monitoring function in beta version.
Cost monitor.
#1 - When fuel monitoring is switched on, shows fuel left in the tank.
#2 - When fuel monitoring is switched on, shows expected driving range.
#3 - Can show either fuel spent since the last counters reset or fuel price.
One can say these fuel monitoring functions is a gimmick. But based on veteran car owners requests and just these users whose dash stopped working, this should be a welcome addition.
Cost and Fuel settings.
New looks and also trying to give you helpful information as a reward for the data you enter, surely can serve as MPG/Liters calculator as always: