Products and byproducts Re-refining products Typical specification of the output products Byproducts Typical specification of the byproducts SN 150 Density 0.80~0.82 Flash Point >180°C Colour (API Group I) 1.5 - 2.0 Viscosity @ 40 C Cst 25 ~ 37 Viscosity Index > 95 SN 300 Density 0.83 ~ 0.85 Flash Point > 210°C Colour (API Group I) 2 - 2.5 Viscosity @ 40 C Cst 38 ~ 42 Viscosity Index > 95 SN 400 / 500 Density 0.85 ~ 0.88 Flash Point > 230°C Colour (API Group I) 3 - 3.5 Viscosity @ 40 C Cst 80 ~ 110 Viscosity Index > 95 Residual Fuel Oil Density 0.95 ~ 0.99 Flash Point > 110°C Viscosity @ 40 C Cst 160 ~ 180