I wonder where police cars get their gasoline from?

https://lemm.ee/post/1575716

I wonder where police cars get their gasoline from? - lemm.ee

I’ve never seen a cop fill up at the gas station.

It depends on where you live, but a lot of large US cities have their own fueling stations. That way, the city can buy fuel by the tanker load and avoid gas taxes.
Still pay taxes even by the tanker. Can still get a lower price but fuel taxes are fuel taxes doesn’t really matter how you buy it.
Surely a public entity would be exempt from taxes, no?
Maybe. But in that case they would be exempt at a normal pump as well. Gas station by my house accept tax exempt transactions for the cemetery my family maintains.