Learn how to say Mileages correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word mileage:
a distance expressed in miles
the total number of miles that a motor vehicle has travelled
allowance for travelling expenses, esp as a fixed rate per mile
the number of miles a motor vehicle will travel on one gallon of fuel
(informal) use, benefit, or service provided by something ⇒ this scheme has a lot of mileage left
(informal) grounds, substance, or weight ⇒ some mileage in the objectors’ arguments