Get (some kind of) mileage out of (something) phrase
To be capable of driving a vehicle a certain amount of miles before having to halt and make the gas tank full again.
I don't think you will get good mileage out of that worn-out car.
Getting great mileage out of this old car is unbelievable.
To make use of something to a certain extent.
I got a lot of mileage out of my shoes before they wore out.
I wish I could get better mileage out of this pen. I bought it last week, and now, it has already run out of ink.
The verb "get" must be conjugated according to its tense.
The origin of this phrase is not clear.