I would like to see that paper.

From what I've read, it seems that most people on here are reporting their FCD mpg and not the calculated mpg. this is fine if people realize the discrepancy but also from what I've read it seems that in later models this problem has been corrected (or at least improved) which makes it hard for anyone to compare mpg between cars. Its also made harder because the threads that have mentioned this don't appear to show much consistency in how far off the FCD is from actual (I've seen 10% over estimation to 5% under estimation reported).

I'm trying to figure out just what sort of mileage I should expect given my driving conditions but when I look at others' results, even if I assume they are reporting the FCD, I still don't know how inaccurate their FCD is. (Of course, the other big unknown is what speed they are driving since that seems to be the biggest factor affecting fuel efficiency).

shawn