Lean fueling of spark ignited (SI) engines is a valid method for increasing efficiency and reducing nitric oxide (NOx) emissions. Gasoline direct injection (GDI) allows better fuel economy with respect to the port-fuel injection configuration. through greater flexibility to load changes. reduced tendency to abnormal combustion. https://www.royaltyfurnitureandappliancers.shop/product-category/dining-tables-with-extensions/