Never liked running on fumes, I tend to subscribe to the old-fashioned view that by running a tank to empty you're more likely to have problems with dirt in the fuel.
I think the i10 warning light comes on with about 4 litres left, never been brave enough to test just how far that takes me. Ford gauges used to be the most pessimistic, often showing empty when there was another gallon or so left; on my Renault 16, empty meant just that.
For the bikers amongst us; how many have made the classic mistake of forgetting to re-set the reserve tap after filling up, and then running out completely? Thankfully, less likely in the modern age with automatic reserves and fuel gauges on bikes being more commonplace; I suppose there are some advantages to modern technology!
Brings back to mind my old Rover 2000, the only car I ever owned which had a manual reserve tap. Were there others?
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