It's moments like this where I wish the milage database would provide per-model-year information.

It'd be useful to know if the '05 -> '06 mpg difference was testing procedure or functional change. The tax credit not changing '05 -> '06 (pre-update) seems to imply that it was a testing/reporting procedure thing instead of a functional difference thing, but Google has been unhelpful in clearing up the distinction.

It's also funny because the EPA hasn't posted the '07 mpg numbers as of a day or two ago. Glad to see they're out.

Mike