I'm no expert but that Fifth Gear test is based on Euro fuel blends and a fairly low performance motor, not sure you can take those results and equate them to our 5 series engines.
Originally Posted by Needsdecaf
Fifth Gear just did a test of gasolines. The results among all the name brands tested was negligible.
2011 550ix Alpine White, Black, 775, ZSP, ZDH, ZP2, 2TB, ZCW
2013 X5 35i Premium, Conv.pkg., Prem. sound, multi contour seats, cold weather pkg.
Porsche 997 GT3
Porsche 993 Cab
Porsche 996 Turbo (Ruf 550) gone but not forgotten