Lalli Singh of New Delhi in India mentioned to me that they were getting over 40,000 on the AVLs without any problems at all. He contrasted that to the iron cylinder ones which he said could give problems much earlier, by 15,000 I think he mentioned.
In contrast, there was mention once of an older gentleman who had gone 250,000 on his old (late 60s?) BMW before its first rebuild, and over 350,000 in all. BMW K-75s, often referred to as "bullet-proof" have routinely gone over 200,000 without much problem.
Some confusion here between mileage and miles. Mileage (mpg?), total miles.