E20 Petrol May Affect Rubber Parts in BS-III Vehicles, No Engine Changes Needed: Nitin GadkariUnion Minister Nitin Gadkari said E20 petrol does not require engine modifications but may affect certain rubber parts and gaskets in BS-III vehicles manufactured before 2016. E20 Petrol May Affect Rubber Parts in BS-III Vehicles (Img: X)New Delhi: Union Road Transport and Highways Minister Nitin Gadkari has said that vehicles manufactured under the BS-III emission norms may require replacement of certain rubber parts and gaskets when using E20 petrol. No Engine Modifications RequiredAccording to the minister, research has not indicated any requirement to modify engines to run on E20 petrol. The studies found no significant changes in drivability, engine start-up, metal compatibility or plastic components in either newer or older vehicles. Also Read: Nitin Gadkari Moves Bombay High Court Over Defamatory E20 Posts and Deepfake VideosOlder BS-III Vehicles May Need Minor Component ReplacementGadkari, however, noted that testing on BS-III vehicles manufactured before 2016 showed that some rubber components and gaskets could deteriorate over time when exposed to E20 fuel.