This data-file models the economics of Eni’s Slurry Technology, for hydro-converting heavy crudes and fuel oils into light products. It is among the top technologies we have reviewed for the arrival of IMO 2020 sulfur regulation, achieving >97% conversion of heavy fractions. The catalyst is stable and handles even ultra-heavy inputs. We see 10-20% IRRs at $20-40/bbl upgrading spreads. The data-file also summarises EST’s adoption in refineries to-date, future plans, and technical details of the EST process.