deilenberger
A bozo on the bus
Your early failures sound like luck of the draw.. not fuel additives. As far as your third strip - sounds like it was replaced after BMW pulled all the in-stock strips from dealers and replaced them (around April of 2013 I believe.) My friendly local shop service manager when last I checked still hadn't had to do any "redo's" on strips replaced since then. He thinks the vendor (who likely also made the fuel pump) might have found a fix.Maybe it helps, maybe not, but the third strip has held since last summer.
JayJay