I'm not sure if this is the right place to post this, if not please move it and accept my apologies.
There is something really wrong with the diesel supplied at the IOC shed near commercial bank borella.
I've been filling there for the last few months and noticed a huge drop in mileage (doing around 8km/l with great difficulty).
Switched to another shed (non IOC) and immediately returned to 10km/l which is my usual average.
I'm not sure what to conclude - either the fuel is substandard or quantity is reduced.