How much did Filter House charge you for the claimed OEM Filter? The OEM Filter of City is indeed Oiled. Filter House is just a thug. They used to be good, however recently they have started charging insanely and keeping inferior quality parts. I have been dealing with them for quite a while now regarding Filters of CAT generators and transport trucks.
They used to stock VIC Filter for City, which IMHO is an excellent value for money. It was priced at PKR 800 and all of sudden they jacked up it's price to PKR 900. Try VIC if you can source it, it easily lasts 5K KM