I,ve had one for two months and I use it mainly for long highway trips from Pattaya down to our house in Trang.....first return trip came out at 18.5 kms/litre......next trip 17.9 down and return last week 19.2 kms/litre on mainly E20 fuel (I have used 95 with out any noticeable difference) car has now 5400 kms on the clock and I drive conservatively doing 100 kms/hour where road conditions allow....whether fuel consumption improves as the engine gets fully run in I do not know......while down in Trang we did a short round trip 54 kms and I purposely drove around 60/70 kms/hour and returned 20.2 kms/litre.