version was produced. This arrangement ensures a constant load on the shafts: the crank drives one shaft, which drives the second, which then drives the oil pump. The shafts spin at twice the engine rpm, forcing the redline to be reduced from 6800 to 6500 rpm. Output is and . This was the only Quad 4 produced in 1995. This was known as a transitional year for the engine family. Applications: 1995 Pontiac Sunfire GT 1995 Chevrolet Cavalier Z24 1995 Pontiac Grand Am 1995 Oldsmobile Achieva 1995 Buick Skylark LG0 The "high output" LG0 was rated at from 1989 to 1992, in 1993 and in 1994; both the 1993 and 1994 power reductions were a direct result of the first two rounds of the Quad 4's NVH reductions; both being exhaust port size reductions. Changes that differentiate the LG0 from the LD2 engine are more aggressive camshafts and an extra half point of compression; 9.5:1 to 10.0:1. These engines were recommended to run exclusively on premium fuel with a 91 octane rating or higher due to the compression ratio. The high output engine was introduced with both a special production run of 200 Cutlass Calais International Series coupes, as well as 200 Grand Am SE coupes — all featuring bright red paint, and gray interiors. The LG0 engine was only available with the heavy-duty Getrag designed HM-282/NVG-T550 five-speed manual transmission. From 1989 to 2009, the Quad 4 held the title of being General Motors' most powerful naturally aspirated regular production four-cylinder engine (with the exception of the 2.9L I4 Atlas engines used in 2007-2012 Chevrolet Colorados and GMC Canyons). Only recently was the LG0's rating eclipsed when the 2010 model year Ecotec LAF was launched in the Buick Lacrosse and Chevrolet Equinox. The LAF has a rated output of but does so with an 11.4:1 compression ratio, gasoline direct injection and variable valve timing. There was a limited production version of the LG0 engine offered in select Oldsmobiles which used the designation "W41" (listed below). LG0 applications: 1990–1993 Chevrolet Beretta GTZ 1994 Chevrolet Beretta Z26 1989–1991 Pontiac Grand Am SE 1990–1991 Pontiac Grand Am LE with the "sport performance package" (RPO: W32) 1992–1994 Pontiac Grand Am GT 1989–1991 Oldsmobile Cutlass Calais International Series 1990-1991 Oldsmobile Cutlass Calais Quad 442 1992–1994 Oldsmobile Achieva SC 1990 Oldsmobile Cutlass Supreme International Series W41 The W41 was the highest-output Quad 4. The 1991–1992 W41s