I think 41 mpg should be easily attained with your Civic. I have been working on my driving technique for the past year, and just today made a return trip of 350 km total and averaged 6.05 l/100km (39 mpg). At one point before re-entering the city the Scangauge read 5.8 l/100km trip average. The car is a 2000 Saturn LS-1 with 2.2 litre 4 cyl. engine 5 Speed manual. This is the highest I have ever achieved, but I think there is still room for improvement. I used pulse and glide, engine off coast, etc. but was running at between the speed limit and 5 to 10 km/h over. I had a brief go a drafting a big rig, but I found it about equal to P&G. As the Civic is a smaller and lighter car, it should do considerably better. By the way, windows open adds lots of drag. The best is to open them only 1" or 1-1/2" and only the rear ones if you can survive the heat.
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