I reduce the percentage biodiesel for the winter (sub-freezing) and use petroleum diesel to offset the bio's cold temperature flow issues. The petroleum diesel has about 10% higher BTU content than the bio, so my winter fuel consumption rate doesn't take much of a hit.
or for the glass-half-full types: My summer mpg doesn't rise much above my winter numbers because I use more of a lower energy density fuel by choice.
but even petroleum diesel has different blends, more D2 in the summer and increasing amounts of D1 (or kerosene) in the mix as the temperature falls or latitude moves closer to the pole. The same seasonal gripe about falling numbers with winter fuel hits the oil-heads, too
i live in ontario, canada and we too have the 10% ethanol year round...and dont even get me started on winter mpgs. ugh. especially the short trip i take to work, any car is just barely warmed up by the time i get there not even on the really cold days. gobbles gas bad.
The Solstice' gone to 24 from 26 mpg summer, I also added more air to the tires once we got in the 30's-20's, the tires went from 28 to 21 lbs. once it got cold. Baltimore is gasoline, but all I get in Virginia or Phillie is e10.
I feel your pain, haha, my mpg calculation from yesterday's fillup was 29.45mpg, 25% lower than the previous tank, which was 39.32 mpg. Morning temperature yesterday here in FL was in the 40s. Winter being one of the main reasons why the mpg dropped by so much.
I went the same routes as my last tank, and the tire pressure was lowered to 33 PSI from 35 PSI. Driving while not caring much for the mpg may also have contributed to the lower mpg.
At least our cars ain't getting below 20 mpg like those behemoth SUVs (H2, Escalade, etc).
Carl's is one of the places you just have to see if you're in the area. Its a drive-in ice cream shop that's frozen in time sometime in the 50's. He closes up shop every winter and doesn't re-open till sometime in march. Its at 2200 Princess Anne Street. From King George take route 3 accross the Chattham bridge into Old Town. As soon as you cross the bridge make a right (I think that's Sophia St) That's going to parallel the river for about 1/2 mile then make a 90 degree turn left. right after you are forced to make the left make a right on the first cross street (Can't remember the name). It will be one way on that section. Get in the left lane. Right when it changes to 2 way traffic you want to make a left, then an immediate right onto Princess Anne St. Carl's will be about 2 or 3 blocks up on the left. Be prepared for long lines on weekends and evenings.