I purchased the MG-60 from Ralph a while ago for my home heating system that uses #2 heating oil. The fitler actually supplies both the furnace and my hot water heater and it has no problems flowing enough oil to keep both units running fine. Also, the system has a return line so there is actualy alot of oil flowing through the filter in a "loop" type circuit. There was a definite improvement in the sound of the burner and the soot and smoke from the chimmney is gone. When I change the filter it is black and full of small carbon like pieces, also the oil tank is brand new so #2 oil must be very dirty. The old filter was never dirty and the element use to cost me about $9.00, now all I do is replace a roll of TP every few months and I'm good to go. If you have a fuel oil heating system you have to get one of these filters.