Editing Quad 4 engine (section)

=== LG0 ===
The "high output" 2.3-liter LG0 was rated at {{cvt|180|hp|kW|0}} from 1989 to 1992, {{cvt|175|hp|kW|0}} in 1993 and {{cvt|170|hp|kW|0}} in 1994. Both the 1993 and 1994 power reductions were a direct result of the first two rounds of exhaust port size reductions for NVH control. The LG0 is differentiated from the LD2 engine by aggressive camshafts and an extra half point of compression; 9.5:1 to 10.0:1. Premium fuel with a 91 [[octane rating]] or higher was recommended for these engines due to the compression ratio.

The LG0 was introduced with special production runs of 200 Cutlass Calais International Series coupes, and 200 Grand Am SE coupes, all featuring bright red paint and gray interiors. It was only available when paired with the heavy-duty [[Getrag]]-designed [[Getrag 282 transmission|HM-282/NVG-T550]] five-speed [[manual transmission]].

A limited production version of the LG0 engine was offered in select Oldsmobiles with 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&nbsp;442
* 1992–1994 [[Oldsmobile Achieva]] SC
* 1990 [[Oldsmobile Cutlass Supreme]] International Series

==== W41 ====
[[File:W41engine.jpg|thumb|right|A 2.3-liter Quad&nbsp;4 W41 engine]]
The W41 was the most powerful Quad&nbsp;4. The 1991–1992 W41s were rated at {{cvt|190|hp|kW|0}}, while the 1993 W41 was rated at {{cvt|185|hp|kW|0}} as a result of the first round of exhaust port size reduction to improve emissions and other changes to the Quad&nbsp;4 architecture to reduce NVH. The additional {{cvt|10|hp|kW|0}} came from longer duration cams and a different [[Engine control unit|PROM]].

Part of the W41 drivetrain was a specific version of the HM-282/NVG-T550 with a gear set otherwise unavailable. All W41 five-speed transmissions had a final drive ratio (FDR) of 3.94:1 whereas the 1988–1992½ LD2 and LG0 transmissions all used a 3.61:1 FDR; the 3.94:1 FDR was used on all 1992½–1994 LG0 transmissions, but retained the standard HM-282/NVG-T550 gear set.

W41 applications:
* 1991 [[Oldsmobile Cutlass Calais]]
* 1992–1993 [[Oldsmobile Achieva]] SCX
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