Sorry for the late reply; been a bit distracted the last few days. I really don't know about the continuous thing, but that particular item was for a US-brand vehicle, and 'word on the street' about engine testing at major car mfgrs these days is that it's far more abusive than anything we could likely achieve in a/c. One test (just one of many) that's been mentioned is running for hundreds of hours, alternating between max power and max torque, stopping only for oil changes at the 'book' interval.
Charlie
Of course, dumping that oil heat load into the water means a significantly bigger water radiator would be required.