Efforts in bringing about near-complete combustion, also bring effortlessly an altered pollution scenario when dealing with oil [fo/hfo/rfo/lshs]. A very simple yet highly efficacious technique is by adopting eff [emulsified-fuel-firing], which aims at injecting water into oil to create stable water-globules. Eff ensures near-complete combustion, affecting nox, sox and spm. The common impurities in fuel-oil like sludge [produced during storage, precipitation of asphaltenes, polymerisation, oxidation and biological action on oil], asphaltenes [solid organic compounds, sharp increase due to process like vis and catalytic cracking], waxes and paraffins, have higher mp and hence precipitate out] cc [conaradson-carbon/hard graphite invariably present 12-15 percent ], water [contaminated percent age from 1-7 percent ]. Principle in volved in ef is atomisation of water - call it moisture - in to oil-droplets. Emulsified water droplets contained in every atomised fuel droplet rapidly vaporise and expand in ocmbustion chamber, shattering oil in to many smaller droplets for faster burning, result in lower particulate emission, in turn reduces nox formation. Lower excess-air will affect sox and nox. A natural more compact flame increases gap between flame envelope and walls. Eff thus in totality assures oil-saving and contains menace of pollution drastically. Grp-eff accepts water up to 17 percent and allows emulsification of cheaper grades of acceptable hc, like fatty-acid-residue, etc.