hi, I bought an old model mehran (1991) it was in pretty bad shape in terms of suspension as it was leaning on left side.My father got some work done as front hissa, front shock kabali installed, rear kamani shock repaired , wheels changed kabali but in better shape front two alloy rim , carburater washed and small jet installed .After spending around 30k on mechanical work , the car is still not giving reasonable mileage.its mileage is not more than 6 to 7 .what can i do to improve its mileage ? another bothering thing is, its clutch which is very hard and downgearing is hard as well