Aoa. Dear brothers, kindly guide me if you can. i presently possess the 2007 shape mira but its model is 2012/2013. It possesses an eco light and no apparent lag between gear shifts. Engine number in registrarion is KFB865489. When i purchased it two years back with odo reading of about 240000, Previous owner had it for two years and was using 20/50 mobile oil so i went along with it as it used to reduce about one quater mobile oil inbtw periodic oil change intervals. Nowadays, its just guzling down the mobile oil. The fuel consumption without ac has also droped from 22km/L to 17km/L and with a/c from 20 to 15.5. There is no apparent mobile oil leakage and also negligible smoke. The transmission according to my mechanic is CVT and 4WD (rear diff has been disengaged by previous owner). I dont want to change the car as its driven by my driver and i am not comfortable to hand him over any more expensive car.
Long story short, i am a technical person, and possess a good mechanic as well but i need firsthand opinion from mira users,
should i switch from a 4WD CVT to 2WD CVT (which will cost more obviously but i hope to get more mileage and speed which i am losing due to the absent rear diff)
Or should i revert it to the former 4WD by just changing the assembly and ignore the gear??
Or should i do the overhaul??
Pronto opinions needed. (This car route is like 100km/day, 4 days in a week on a highway, with max speed upto 80km/hr with most drive on the route is brake and accelerate).