Just reviving this thread. I've got an automatic 2003 Accent with the following mods: - Sportivo Exhaust (with larger 2.5" tip welded on) - Apexi PowerFC Car's only done about 74,000kms to date. After reading this thread, I pulled out the battery to reset the ECU and when I tested the fuel consumption, I was able to get approx 400kms on a full tank before the fuel indicator would turn on. (Using normal unleaded 91) My trips are very short, with lots of starts and stops. The majority of my trips are between 5-15min drives. Is that about right or should it be able to pull better figures?