I just changed my oil myself and it took a total of around 8.4L to fill. The oil level marker is right at the top arrow, so I would say 8.25 should do you just fine. I did let the oil drain for a while so it may take less if you do not let the oil drain completely from the openings in the oil pan.
2012 Audi R8 V10, 6MT, Suzuka Gray, Larini Clubsport exhaust, GMG springs, Satin Black badges
2012 Audi A6 Prestige, Moonlight Blue
2009 Lexus ES350, Sparkling Graphite
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