Sorry for the late reply.
Firstly, I am really sorry if I gave you the impression that you don’t care for your car, my statement was a general observation and still I personally feel that Civic owner’s drive their car way more spiritedly then any other corolla, lancer, sunny etc and maintenance/parts & service is expensive comparatively.
Let us make one thing clear, that we are not talking about average in conditions like traffic jams of Karachi (very troublesome & frequent at evening from I.I Chundrigar road to Sharah-e faisal). Nor we are talking about driving above 6,000 RPM (as I often do).
Further, I believe 55kg water capacity means 7-8 kg of CNG (depending on pressure), it means you are getting 11KM/KG, honestly, is that good, and if it is then what’s the purpose of having CNG.
1 Voiding your warranty
2. Depreciating your Engine’s life.
3. Putting burden on your rear suspensions all the time.
4. Waiting in ques to get CNG.
5. Spending nearly 35-40K, plus more tune-ups that are frequent.
6. Carrying a hazard in the trunk of your Car.
Theoretically, if I agree that 75-85km is the average of a well kept VTi, what would you suggest for 8th gen Civic with R18 IVTEC 1.8L 140BHP carrying 100kg more (65-75Km), for CL7 (55-65Km) & CL9(45-55Km) having K20 (157BHP) & K24 (197BHP) & another 75 & 70kg more respectively, and those Huge Thailand Camry with 2.4l 2A-FE (35-40km) with 1.4 Plus Tons of weight & lets not talk about Mark X 2.5L 4GR-FSE and 2GR-FE 3.5L and Prado 3RZ-FE 2.7L & 5VZ-FE V6 3.4L.
Let me quote you a figure, 11.5km/l in a mix of city/highway driving, car used 7th Gen 2001 Civic EX AUTO 1.7l VTEC, with 89RON Petrol on full 50 liter tank for 2 yrs straight, that was my brother’s car, mine was the same Civic with DX trim, Manual 1.7l non VTEC 13km/l, Place, Edmonton, Canada, from workplace to home. On highway, I have consistently averaged 15 & 15.5 KM/l @ 100km/hr 3rd gear.
Considering the manufacturing tolerance of Honda PAK, Road and driving conditions, and the fact that engines here are 1.5l & 1.6l respectively with no CAT Converter and noise & emission test to pass, the Fuel economy should be within the range of plus or minus 10%.
All mainstream 4-cylinder engines should give normally 50% more fuel economy (30% at minimum) on per/KG basis compare to 1 liter of petrol.
I have seen threads where people claiming their 1988 E90 Corolla with 2E Carb 12 valve doing 160Km in City, Cuore doing 150-175 KM in 40kg tank, SE Saloon 1.6L doing 100-120KM, Altis 1.8L Doing 90-100Km & 120-140KM (OMEGAS), Cultus doing 150-175KM, are those claims unreliable?.
My 1988 3G(CA4) Accord gives me more then 90km with A/C & around 130km w/o A/C on highway normally, that’s a 21 yrs old A16A1 with 88HP 12 valve CARB & iron block compare to a 3-5 yrs old D16 with aluminum head, higher compression, 16 valve, 3 stage VTEC & almost 127HP on its tap.
Civic is the most fuel economic car regarded in whole world along with Corolla (apart from Hybrids), its Engine won for it many prestigious awards since 1976, to name a few, Japan Car Of The Year (for more then 25 consistent years & all 7 Generations), American COTY, European COTY, Ward’s 10 best engine list, R&T import of the year. It remained 3rd best selling car of America & Canada for 15 consecutive years (after Accord & Camry), and we are arguing that it falls almost 50% behind a 22 year old 12 vlave CARB (Corolla, Accord).
1996 Exi already has 105BHP non-VTEC and VTI 125HP (at least what Atlas Honda has advertised) with 2 stage VTEC (compare to 108BHP non VTEC & 127BHP 3 stage VTEC for 7th Gen EXi & VTi). 7th gen Civic engine was finished for more refinement, tractability, emissions and robustness rather then raw power.
That is surely a very long post to read, but I am confident & satisfied that I am elaborating something, I am only writing this because I love 7th gen Civic & I believe its way better then the 8th Gen.I do not want to impose anything & we should be open for discussion as long as it is constructive & can be of any use to us.
Kind regards & happy new year to all.