Originally Posted by krisnet55
I hate to say it but you guys are so damn biased. I'm not saying the car is a pos I'm saying something is wrong.
I can't see how you cannot think that your MPG for entry #7 wasn't 164 miles using 11.36 giving 14.4 MPG. That may well be reasonable for high traffic short trips.
Clearly something is wrong in the earlier periods. However most problems with the vehicle that would cause such miserable mileage would cause the MIL (malfunction indicator light) to light. If the average fuel consumption indicator is showing similar numbers, that would tend to point away from siphoning. I suggest you note the indication when you start driving, and then reset the indicator. See what the indicator shows after your driving. If it is showing 17 MPG in stoplight to stoplight driving that you do, but shows 8 MPG when somebody else controls the car, that would indicate where to look. If there is little difference in mileage when others control the vehicle, then a problem with the vehicle would seem likely.
Considering other possibilities seems reasonable. You are wise to be making use of Fuelly. You only had two fillups around 12/13/12 where your mileage went highly wacky. I don't know what your parking situation is. If you give the keys to an attendant, maybe he was sitting in the car idling for periods.
I still think you should do the things I suggested in post #16 on this thread.