I don't normally check to see which ful (winter/summer) is pumping, but will take note today when I hit the fuel depot. Normally I see about a 1-1.5 mpg drop with the winter fuel, which on my Benzes is a good 10% drop in mileage.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.