Hi,
Congrats on your new purchase.. JDMs are fun to drive and own.
Regarding Fuel Consumption:
As per my analysis, Total Petrol pump @ M.M Alam Road has the best Petrol of Lahore.. My car always give better mileage when fueled by that pump.. You already know soft pedal pressing and smooth drive.. Now do coasting as well.. Lets say you see the traffic light turning red while being few hundred meters away, You can always put the car in Neutral gear and let it coast till the stop line..I personally do this..(InshAllah Afaaqa ho ga) Lolzz.
In Lahore's traffic you,ll be getting around 14.5 - 15.5km/l these days as A/C is off.
Maintenence Parameters include. Regularly changing oil + oil filter, Getting the throttle body serviced.. Valve clearance setting (Tappets)..Air filter replacement.. Brake servicing.
You need to change the spark plugs if you havent changed till now. Dont just buy and put the plugs rite away, Get the Gap Adjusted as per your engine requirements. Plugs never come PRE-GAPPED.. They need to be gapped as per the engine requirement.
The work required determines the need to take it to any roadside mechanic or to a specialized one. Lets say you need to get tune up. You can go to any good mechanic regrdless if he has worked before on any japaneese car.. But lets say you need to get some critical thing done, then visit an experienced wshop.
Dont change the height of your car. Alot of things would be disterbed with increasing the height such as : Camber settings / braking / side slip / Thak Thak sound while bouncing off speed breakers. NOT RECOMMENDED