E-20 petrol in India specification for E20 motor gasoline is IS 17021:2018 – E20 Fuel: Admixture of Anhydrous Ethanol and Gasoline as Fuel for Spark-Ignited Engine Powered Vehicles. BIS currently lists IS 17021:2018 as the applicable E20 specification. Among the important characteristics specified for E20 are:
The Ministry of Petroleum & Natural Gas’ Industry Quality Control Manual identifies E20 as IS 17021 and provides the applicable quality-control framework for petroleum-product handling and distribution.
E-20 PETROL SPECIFICATION
| Parameter | Specification / Limit | Unit |
| Ethanol Content | 18.0 to 22.0 | % by volume |
| Research Octane Number (RON) | Minimum 95.0 | Rating |
| Motor Octane Number (MON) | Minimum 85.0 | Rating |
| Density (at 15°C) | 740.0 to 785.0 | kg/m³ |
| Total Sulfur Content | Maximum 10.0 (10 ppm) | mg/kg |
| Water Content | Maximum 0.05 | % by mass |
| Reid Vapor Pressure (RVP at 38°C) | 45.0 to 60.0 (Summer) / 67.0 (Winter) | kPa |
| Benzene Content | Maximum 1.0 | % by volume |
| Aromatics Content | Maximum 35.0 | % by volume |
| Olefins Content | Maximum 18.0 to 21.0 | % by volume |
| Oxygen Content | Maximum 7.4 | % by mass |
| Methanol Content | Maximum 0.5 | % by volume |
| Lead Content | Maximum 0.005 | g/l |
| Gum Content (Solvent Washed) | Maximum 5.0 | mg/100 ml |
| Copper Strip Corrosion (3h at 50°C) | Class 1 | Rating |
| Distillation: Recovery at 70°C (E70) | 20.0 to 48.0 | % by volume |
| Distillation: Recovery at 100°C (E100) | 45.0 to 70.0 | % by volume |
| Distillation: Recovery at 150°C (E150) | Minimum 75.0 | % by volume |
| Final Boiling Point (FBP) | Maximum 210.0 | °C |
| Distillation Residue | Maximum 2.0 | % by volume |
