If serviced at 100, won’t need service into 150-160,000. If you want to make sure it’s topped off there is a procedure for that basically get the temp to 30c and fill until it overflows at the fill port. (Double check that temp). GM I think recommends 60,000 mile service interval

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)