As I drive my auto like 'Miss Daisy', I am getting well over 50 mpg and about 300 miles per tank. A word of warning; the fuel consumption meter overreads by at least 10%. My fuel calculations come from filling to the brim and checking miles done since last fill. I rarely drive over 60 mph. Moreover, in response to CooperMan's comment about range anxiety, I have no worries and, unlike charging an EV, we can fill our fuel tanks in 5 minutes. My chum in his Porsche Taycan takes one hour; assuming he can find a charging point available.
This is all assuming the odometer is reading accurately of course. if the fuel consumption meter is apparently incorrect, it could be getting duff inputs on mileage travelled, which in turn of course could also affect your own calculations.
