Thanks for pointing out, the vehicle was giving me 17/18 in city and up to 20/21 on motorway but now the mileage is down to 15/16 in city and 17 on motorway. I was using PSO synthetic oil but during the tune up at Pak Suzuki, the oil was also changed and since that day i noticed the dip in mileage. The vehicle was and is under the use of my driver so there was no change in driving habits. Now, as i said, i am happy with the way the engine responds after the tune up but the mileage issue is somehow bugging me. One more thing, spark plugs were also changed during the tune up.
