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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.

    Oldsmobile · 1983-1988

    Cutlass Supreme — G-body (1983–1988)

    cutlass supreme · cutlass supreme brougham · cutlass salon · cutlass salon brougham

    7 option rows 7 RPO codes 6 model years
    0% Factory-verified
    • ✓ Factory-verified · 0
    • ● Confirmed · 0
    • ◑ Single-source · 7
    • ⚠ Disputed · 0

    Applicable options

    Documented RPO codes

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    Model year
    Code Option Years Notes & factory source Confidence
    Engines
    LD5 Engine, 3.8L V6, 231 cu in, 2 barrel 1983–1987
    the standard engine; Wikipedia's Buick V6 article lists the Cutlass Supreme through 1987 under its general 231 section, not under a separate LD5 heading and its Cutlass Supreme article drops the 3.8L V6 in 1988; eightiescars.com prints LD5 for the 1985 coupe; shared G-body code, cited from the Chevrolet Monte Carlo kit, whose pages print it only as a California emission engine (1983–1984)
    GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
    GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
    		Single-source
    LV2 Engine, 5.0L V8, 307 cu in, 4 barrel 1983–1988
    optional engine through 1987 and the only engine in 1988; Wikipedia's Oldsmobile V8 article lists the Cutlass Supreme through 1987 and the Cutlass Supreme Classic for 1988; eightiescars.com prints LV2 for the 1985 coupe as a 140 horsepower option; no Monte Carlo kit offered this code
    		 Single-source
    LG8 Engine, 5.0L V8, 307 cu in, 4 barrel, high output 1983–1987
    only in the Hurst/Olds on the Cutlass Calais coupe (1983–1984) and in the 4-4-2 (1985–1987); Wikipedia's Oldsmobile V8 article, which dates it from 1983
    		 Single-source
    LF9 Engine, diesel, 5.7L V8 1983–1985
    optional; Wikipedia's Oldsmobile Diesel article lists the Cutlass Supreme through 1985 and its Cutlass Supreme article withdraws the diesel V8 for 1986; eightiescars.com prints LF9 for the 1985 coupe; shared G-body code, cited from the Chevrolet Monte Carlo kit (1983–1984)
    GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
    GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.
    		Single-source
    LT6 Engine, diesel, 4.3L V6 1983–1984
    Wikipedia's Oldsmobile Diesel article lists the Cutlass Supreme and Calais for this code through 1984; nothing Oldsmobile-specific beyond Wikipedia prints it; shared G-body code, cited from the Chevrolet Monte Carlo kit (1983)
    GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
    		Single-source
    Axles
    G80 Axle, rear, limited slip differential 1985–1987
    a separate order item that many 4-4-2 cars lacked, per Wikipedia's 4-4-2 article (a general statement; the 1985–1987 span is the article's 4-4-2 production span); shared G-body code, cited from the Chevrolet Monte Carlo kit's order pages and option weight pages
    GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.73.
    GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.83.
    GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
    		Single-source
    Packages & Trims
    W42 Package, 4-4-2 1985
    4-4-2 package on the Cutlass Salon with the LG8 engine and a 4 speed automatic, replacing the 1983–1984 Hurst/Olds; Wikipedia's 4-4-2 and Cutlass Supreme articles; 1986 left out because Wikipedia makes the 4-4-2 a model line that year and does not print the code for it
    		 Single-source

    Source document: oldsmobile/cutlass-supreme-g-body.md. Rows marked — record an option the factory offered whose RPO code is not documented in the consulted sources.