For my 2007 vehicle, your site imports the EPA numbers based on the old testing method and not the adjusted numbers based on the revised testing method. Is there a reason for this? Its just kind of difficult to compare my vehicle to 2008's of the same make/model (with an idential engine and body). Could this be changed? Or maybe give us the option of modifying the numbers ourselves?
The EPA doesn't make their new numbers available in a format that's easy for sites like Fuelly to consume. They make their estimates available here in a computer-friendly format, and that's what we used when we set up the site. Unfortunately these files have the old numbers in them.
We tried to reverse engineer the new numbers thinking it was some kind of mathematic formula, but we weren't able to crack that code.
If the EPA makes the new estimates available for bulk download we will definitely update our system, but updating them by hand is going to be too labor intensive for the size of our operation.
We might be able to set up having people put in their own numbers. It'll require storing estimates for each user. And we wouldn't be able to call them EPA estimates at that point because we can't double-check everyone's entries to make sure they match what the EPA has.
I certainly understand the issue with bulk downloading/importing. Its just bothersome on the user's end to be comparing to invalid/unrealistic numbers. Currently I find myself storing my fillups on two websites (yours and ecomodder.com) so that I can more accurately compare.
Hey pb, thanks for asking the EPA, hopefully they can get you something soon. I'd love to see this done, too, especially since then I'll be clear above the EPA rating instead of barely meeting it. Great site you have.
P.S. 2007 Prius, 48 city, 45 highway, 46 combined, if you have the time :-)