Quicksilver, check my post above and read the Top Tier Gas link. Then tell me if you think there is a difference.

Happy X-ing!

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'05 X3 3.0i Alpine White/Gray Leather/Alum. Trim
Sport/Steptronic/Servotronic/Panoramic
Prem. Sound/Staggered 18" Style 114 Y-Spokes