Depends on which Ferrari you are referring to.
About 11
about 22 m.p.g. (Miles Per Gallon)
There are many types of Ferrari's like the Ferrari Spider, and so forth, but Ferrari's generally go around 200 miles per hour, with an absolute deviation of 10 miles per hour.
the mpg is 17.1 mpg (US) on the EU test cycle.
20 miles to the gallon 20 miles to the gallon
15 miles to the gallon 15 miles to the gallon
it can get 8 miles to the gallon
18.5 miles a gallon
16.5 miles per gallon
52.27 miles per gallon
About 21.4 miles per gallon. (300/14 = 21.4)
Between 13 miles per gallon and 16 miles per gallon.