Originally Posted by bsprtsgrp

Received this email response from ZF NA recently. I was planning on a drop & drain at 78K but I wanted to hear what ZF had to say first regarding this since BMW's standard line is it's a Lifetime Fluid

We stand by BMW’s recommendation of lifetime oil fill on the 5HP24 transmission. However to assure proper operation we advise to perform a drain and fill at 100,000 kilometers or after 8 years. We do offer oil and filters through our distributors. The only approved oil for your ZF 5HP-24 transmission is “Lifeguard Fluid 5” and the oil quantity required for a completely dry transmission is about 10liters.