i might be able to help you in terms of Fuel quality.
we have ATTOCK Pumps in islamabad which provide the best quality fuel you can ask for.
but if you get petrol from PSO in isb the petrol quality is absolutely unacceptable.
you should look for "Company Owned/Maintained" pump in lahore.
only direct company maintained pumps provide quality fuel as franchises compromise on quality and buy lower grading fuel from refinery which save them extra cash.
Attock refinery in rawalpindi provides the best fuel in their company owned pumps in f-11 islamabad.
same refinery sell oil to PSO (islamabad) and pso compromises on fuel grading and buy the cheapest grade possible which result in poor average of cars and loss of power.