Does Shell Nitrogen Enriched gasoline clean better than before?
Yes. The old formula was very good at stopping gunky build-up, but the new formula not only helps keep intake valves cleaner than before, it actually helps deliver clean-up of gunk that lower-quality gasoline can leave behind with all three grades of Shell gasoline. The Shell Nitrogen Enriched Gasolines not only help keep intake valves cleaner than before, they actually help clean-up gunk that lower-quality gasoline can leave behind. And that’s not all—today’s latest fuel-efficient engines are utilizing new technologies creating even tougher conditions with higher pressures and temperatures that can reduce the effectiveness of conventional fuel additives. The new Shell Nitrogen Enriched cleaning system is so advanced it resists thermal breakdown better than conventional additives, allowing it to help seek and destroy gunk, even in the toughest engine environments.