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Originally Posted by Quicksilver
Does everyone else notice the difference?
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On regular (87), yes.
On mid-grade (89), no, not with respect to power or fuel economy.
Here we pay 6% more for mid grade, an additional 6% for premium. I choose to save the 6%, not for the monetary value, but on the principle that I don't like waste. If I could detect or measure any difference using mid-grade vs premium, I would use premium.
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2007 X3 3.0si, 6 MT, Premium, White
Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue
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