True it's more than Volvo recommends, but modern synthetics are so much better than what was available at the time that recommendation was written that it is mostly irrelevant. A D24T has an oil capacity of about 7 liters, which is a lot of oil, and you probably add a bit over the course of 10,000 miles as well. Add all that together and I don't think there is any way you could wear out a good synthetic oil in less than 10,000 miles -- probably even 10,000 is conservative, in fact. VW TDIs go over 10k on OCIs and they are much more highly-stressed engines.
Tom Bryant recommends oil changes at 25,000 miles. That's too much for me, but I think 10,000 or even 15,000 makes a lot of sense. It's also better for the environment -- less waste oil dumped down the drain.
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86 745 D24T/ZF 345k lifted 2.5"
83 764 D24T/M46 155k
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