Based on how far I travel and how much fuel I put in at the pump, my recently-acquired 1995 730i is guzzling fuel at the rate of about 17mpg. But the computer says I am getting nearly 22mpg.
That's a huge difference. Before I go looking for a fuel leak (and I can't smell anything) how much faith should I have in the computer's number? If it is generally reckoned to be pretty reliable, where does it measure the fuel flow?
Roy