I have an 02 Ody that was getting 10-12 mpg. Horrible. After several trips back to the dealer, they finally figured out what was happening. And the Answer is: bad alternator>>>> Turns out the voltage requlator (i guess built into the alternator was sending a faulty signal to make the engine run rich and the fuel was being dumped right out of the tail pipe. As soon as they replaced the alternator, I starting getting 17-19 + mpg again. I guess there is a tech service bulletin on this so make sure the mechanic reads the honda bulletins.... Good Luck