Right now (in Virginia) Sunoco 93 is a relative bargain -- only a 2-cent price difference between it and 91 octane, versus the 10+ cent difference between 87 and 89, and 89 and 91. So it is advantageous to go with the highest octane.

Also, it appears gas prices have begun dropping in the last week or two. I wonder how far they will fall by Election Day....

__________________
2008 E350 4matic / Black/Anthracite

------------------------------------
Gone but not Forgotten:
2001 E430 4matic, 206,xxx miles, Black/Charcoal
1995 E320, 252,xxx miles, Black/Grey
1989 260E, 223,00 miles, Black/Black