Hi, I have a Viessman oil boiler with an oil filter that uses a small cartridge filter which is quickly (about 12 weeks of use) blocked by the dirty fuel we get in Cyprus. The cartridges are very difficult to get – Even Viessmann Europe doesn’t have stock. I’m thinking of changing the oil filter, all the plumbers merchants spoken to (6) have offered me is a stainless steel filter, instead of the replaceable filter. After reading about the filters these will only filter out larger particles from the fuel. Will this different type be suitable? Thanks - Doctor Keo