get a lot of mileage out of
get (some kind of) mileage out of (something)
To use something to a certain degree or extent. The phrase, which is used with variable intensifiers (a lot of, much, more, a little, etc.) to denote how much, is an allusion to the mileage of an automobile as an indicator of the longevity of its usefulness. The president has gotten a lot of mileage out of his tax cuts as a platform for his re-election campaign. One way to cut down on spending is to buy clothes you're sure you'll get mileage out of. I'm afraid you won't get much mileage out of this old computer anymore.
get a lot of mileage out of something
Fig. to get a lot of use from something, as if it were a car. Bob always got a lot of mileage out of one joke. I got a lot of mileage out of my TV before it broke down.