Did Toyota offer extended coverage for engines burning oil?

Not to my knowledge. There is a whole thread on this topic with the solution being the oil catch can return system.

 

So the existing warranty would be Powertrain portion: 60 months or 60K miles, and would require the oil consumption to be greater than something like 1 quart every 600 miles.

If they're not willing to extend that, I'd assume it doesn't bode good.

 

Yeah, 1.1 quarts in 600 miles:



I especially like that last sentence: you can almost hear it carry on, with: "and if it consumes slightly less than 1.1 quarts, or you're past 60 mo / 60K miles: go pound sand."

 

...and some people think it odd I change my oil/filter every 5,000 miles, let alone check the dip stick and tire pressures every fill-up.

 

'when judging the oil consumption, keep in mind the oil may have become diluted, making it difficult to judge the true level accurately'.