So I thought maybe I'd try my luck again. Poured in a bottle of liquid moly ocatane + again with a full tank and guess what, all the bloody misfiring, surging started. No more of this crap.
2012 BMW 640i (AC Schnitzer Package)
2011 Mercedes E250
2007 Ford Mondeo
"Age is but a statistic that has no relevance to enjoyment of horsepower"