I'm pretty new to BMW, but all three times I test drove one, the SA implored me to floor it from a stop and "hold it as a long as you're comfortable," and then to panic brake from about 60 mph. I am by no means saying this is fine and harmless on a car with single or double digit mileage, but if it was truly ruining engines I doubt they would be doing it. I hope so at least, considering I bought mine off the lot. I try not to think about how mine was treated before I bought it
