I recently bought a used 2003 Opel(Vauxhall) Astra G 1.4. I drove around 2000km's in the last few months (city and highway mixed), and I used about 200 litres of gasoline, which means a 10l/100km consumption. This seems a little bit too much, and it might be because I'm really a new to driving. According to other sites, consumption should be much lower (around 6-8l/100km).
A friend, who also has the same car told me, that it probably consumes more, because I have not reset the car when I bought, and it is "not used" to my driving style. He told me to take the battery out, and put it back 20 minutes later, then drive around in low traffic for 20 minutes. Would this really cause better settings in fuel consumption? I don't know too much about cars, and I don't understand how this would work.
Thanks for every answer in advance!
UPDATE: Yesterday I did the ECU restart by taking out the battery, I can't say too much about consumption yet, but the first thing I noticed was that acceleration in 1st gear was smoother than before. So it definitely had some effect. I'll update again when I have enough data about fuel.
UPDATE #2: In the last days I used ~25-26 litres at 270km's, so it didn't really change (it was the same ratio of city/highway than before)