How many miles do they get on the engine doing that?
The fact that NY cabs don't change oil is old news already. The mileage varies from 500,000 to 2,000,000. One cabbie joked, if it's american made the body and parts fall off around the engine.
I should be able to get a million or so because I'm persnickety about flushing fluids (I'm goin'2 P rigt after I post, n'yuk,n'yuk, n'yuk, ooooh, Moe Larry !)
But , serially folks, I've 236,000 on a 93' Dodge Dynasty LE (all the bells & whistles, like an Imperial), still cruises like new and you could eat off the engine (keepin' it real clean seems to help).