Can anybody really tell me what extra process, ingredients, and labor go into premium fuel that makes it cost an extra 20 cents over regular?
Glad I have my SD, but using the wife's car or the 420 is a pinch frosts me when I fill it up.

Thanks

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Thank You!
Fred
2009 ML350
2004 SL600
2004 SL500
1996 SL600
2002 SLK32
2005 CLK320 cabrio
2003 ML350
1997 C280 Sport