As a retired LEO myself, I can also surely attest to the abuse most fleet vehicles in that profession take.
Mind you, I was of the mind set that the vehicle was actually part of my life line, so to speak, that would get me or whomever I was working with to safety and or emergency aid should the need arise. So I therefore always checked fluid levels and made sure my vehicle for the day was good to go.
But so many others just jumped in and drove them. Never checked anything, never took care of them at all. I once got a vehicle that had absolutely no oil on the dipstick it was so low. Or fluid levels gone or way down in other parts of the engine system.
It is nice that you do have the hour meters on them. Mileage in these vehicles as any basis for scheduled service is just not usually a workable option, as the vehicle for our agency would sit a lot, idling all day in the hot southern summer heat, running the AC for the agents.
And I know most all in the profession miss the Crown Vics. I had one assigned to me as the only user of the vehicle later in my career, and enjoyed it immensely.