Don't Be So Dishearted...!!
About Fuel Consumption So Yes.....Auto's Sucks More Fuel Than Manual No Doubt....!! Mostly JDM's Are Auto And Have Good Mileage On CLOCK Genuinely Thats Different That They Reverse Them Back Showing Fake readings
Anyways...You Can Improve Mileage By Checking Following Stuff
Spark Plugs...If Needed Replace Them With Once For All Recomended Iridiums Of IT....!!
Always Use Genuine Air Filter For Best of Mileage
Use Engine Oil Like ZIC Or Caltex...Suiting Your Seasons Use Them....!!
Maintain Correct Tyre Pressure
Try Driving On Constant Speed Around 60-70Km
Best Way To Check Mileage To Once Give Car A Highway Drive On Constant Speed With Less Braking And You Get Real Mileage !!
Have A Ratio Of HOBC In Your Fuel...Like 70/30 Ratio
These All Can Play Important Role In Betterment Of Fuel Mileage
Regards