levels were expanded, and were designated the Brougham, SGL Extra, SGL, GL and the Jack Nicklaus edition which was very similar to the Brougham, which offered the turbo. Other trim levels were the Turbo S, Custom S, Custom Deluxe, Deluxe and the Standard at the bottom. The diesel engine SD22 was offered in 1979 on the sedan GL and DX. The Standard Sedan and Van were discontinued April 1981. October 1979, the 6-cylinder LD28 diesel was added with the automatic transmission selector moved from column shift to a floor-mounted system. December 1979 was when the first turbo L20ET was introduced, February 1980 saw the LD28 6-cylinder offered with a 5-speed manual transmission installed with a floor-mounted shifter, but leaving the column shift for the 4-speed manual transmission. Later in April of that same year the Turbo Brougham appeared. A glass moonroof was also offered on SGL-F models. In April 1981 both models get redesignation of the front grille, headlamp cluster, tail lamp, and "C Pillar" trim. In order to avoid confusion between the 6th gen Gloria and Cedric (both these cars had identical body design and headlights for the 1979 model) Nissan gave both models different radiator grilles; vertical grilles for the Cedric and a horizontal grille for the Gloria Seventh generation Y30 June 4, 1983 saw a major restyle of the previous generation for all versions of the Gloria. Sedans used for taxi service utilized four round headlights whereas other versions upgraded to European style halogen headlights. The straight-six engine, which had been used for many years, was upgraded to an all new V6-design, called the VG series engine which made its debut in the Cedric/Gloria. This was the first, mass production V6 engine built in Japan. The VG range uses fuel injection rather than carburetors for fuel delivery. The VG20ET was turbocharged, for better performance while staying within the Japanese tax parameters for a compact car. The twin-carbureted four-cylinder CA20S engine was fitted to the lowest-spec versions (standard, De Luxe). This four-cylinder was also available in a version built to run on LPG fuel, meant to be used for taxi service. From February 1984 there was also a six-cylinder L20P, which also ran on LPG. In June 1984 the powerful 3-litre VG30ET turbo V6 was introduced. Trim levels offered were the Brougham, SGL, Grand Edition, GL Grand Edition, GL and the Standard. In June 1984 the Brougham VIP