Heys guys i have a 2006 ms3 and my fuel economy is just pathetic as to im receiving approx 280km per 52L tank. I know that this isn't right. My car does not backfire or have any sort of idling issues. I've serviced it not long ago, but i still get the same crap. Clock is approx @ 131000km, fuel being used is caltex 98. Could it possibly be im running an old firm-wire from mazda? any help would be appreciated.