Hi Neil,
Yes, I can see how your Winter fuel economy suffers, although 40 mpg in the Winter isn't what anyone would call terrible. My xB shares your xA's drivetrain, with worse aerodynamics, so you'd clean my clock if you had my Winter weather.
I've seen on the Yaris forums where someone swapped ring gears and bolts from an xA/xB into a Yaris for quicker acceleration. Seems like we should be able to do the opposite.
__________________
Darrell
Boycotting Exxon since 1989, BP since 2010
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? George Carlin
Mean Green Toaster Machine
49.5 mpg avg over 53,000 miles. 176% of '08 EPA
Best flat drive 94.5 mpg for 10.1 mi
Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg
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