Utilize 60 minute buffer in car without cell service or wifi

Hello,
Is there a way to listen to the 60 minute buffer cache without cell service or wifi? Is there a setting to put the paid version on so you do not get a connection timeout and lose your buffer cache!

I do not have cell service so I wanted to cache 60 minutes in the buffer over wifi and then listen to the 60 minute cache in may car without using a cell service.