you are correct, attock's diesel is GOOD, the drivers' of 2 HINO 2.5 ton water bowsers reported to get 4 round trips + 1 way [ approx 19 kms extra ] extra for every 100 liters filed from attock. Compared to 100 liters from PSO or Shell dispensers in Rawalpindi for 4 round trips only.
ironically Attock fuel is available only over Highways in SINDH