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

    Source document

    docs/rpo/oldsmobile/fullsize-88-98.md

    Interactive view →

    Rendered verbatim from the reference. Factory citations shown as ⛭ GM Heritage — …. For filtering, badges, and crosslinks, use the interactive Full-Size 88 / 98 page.

    Oldsmobile 88 / Ninety-Eight (Full-Size) — Option Codes

    Covers B-body 88 variants (Dynamic, Super, Jetstar, Delmont, Delta, Royale) and the C-body Ninety-Eight (incl. Regency), plus Custom Cruiser wagons. The 1961–66 full-size Starfire is covered in starfire-omega.md.

    Confidence: confirmed (2+ independent sources), single-source, disputed.

    Years 1960–1965 — divisional option numbering era

    Factory options in this period were ordered under Oldsmobile's own option numbers/names; the 1965 Chassis Service Manual publishes no option list, and none of the CSM-derived compilations reach back before 1965. Documented highlights (names, not RPO codes):

    Code Description Years Models/Notes Confidence
    — Skyrocket 394 CID V-8 (330 hp Starfire-spec optional in Super 88/98) 1961–64 Engine option by name confirmed (feature), n/a (code)
    — Jetstar I: 345 hp 394, console sports coupe (Starfire running gear at lower price) 1964–65 Marketed model, not an option code confirmed
    — Police Apprehender packages by name (precursor to B-01/B-07) early 1960s Full-size single-source
    — Super Economy / standard axle, Hydra-Matic ("Slim Jim" Roto 1961–64) 1960–65 Transmission by name confirmed (feature), n/a (code)

    Coverage gap: order-form numbers for 1960–65 full-size options require GM Heritage Center order guides; not reproduced in online sources consulted.

    Years 1966–1967

    First years with CSM-documented corporate-style codes.

    Code Description Years Models/Notes Confidence
    B-01 Police Apprehender — City Cruiser 1966–67 Full-size confirmed
    B-07 Police Apprehender — Highway Patrol 1966–67 Full-size confirmed
    L-65 Domestic low-compression V-8 2-bbl 1966 — confirmed
    L-73 Low-compression 330 4-bbl 1966 Jetstar 88 confirmed
    L-74 High-compression V-8 (425 4-bbl in full-size) 1966–67 Delta/98 confirmed
    L-75 High-compression Starfire V-8 (375 hp 425) 1966–67 Starfire; optional in Delta 88 Custom 1967 confirmed
    L-76 High-compression performance V-8 (police; L-74 + plugs/air-cleaner label) 1966–67 With B-01/B-07 confirmed
    L-77 / L-78 High-compression performance V-8s (425) 1966–67 Police/performance confirmed
    N-10 / N-11 Dual exhaust (N-11 w/L-77, L-78; +L-66 in 1967) 1966–67 — confirmed
    M-31/M-32/M-33/M-34 Jetaway automatic variants 1966–67 M-34 HD w/L-76 confirmed
    M-40 / M-41 TH-400 / HD TH-400 1966–67 — confirmed
    J-56 HD brakes (police) 1966–67 — confirmed
    Y-75 HD 15" wheels, hubs & drums (w/B-07; +B-01 from 1967) 1966–68 Police confirmed
    Y-76 HD engine cooling & generator package 1966–67 — confirmed
    G-51 HD rear springs 1966–70 — confirmed
    G-66 / G-67 Superlift rear shocks / automatic Superlift 1966–72 / 1966 G-67 "automatic" is 1966-only confirmed
    G-80 Anti-Spin differential 1966–72 — confirmed
    K-19 / K-20 A.I.R. reactor / closed-circuit PCV (California) 1966–67 — confirmed
    C-48 Heater/defroster delete 1966–67 — confirmed
    U-15 / U-16 Safety Sentinel / engine tachometer 1966–70 / 1966 — confirmed
    T-87 Cornering lamps 1966–72 — confirmed
    A-91 / A-93 / A-98 Vacuum trunk latch / vacuum door locks / vacuum rear door lock 1966–69 A-98 police-oriented confirmed

    Years 1968–1969

    Code Description Years Models/Notes Confidence
    L-65 LC 350 2-bbl (4200 series) or LC 400 2-bbl (4400/4800 Delmont) 1968 — confirmed
    L-66 HC 455 2-bbl 1968 — confirmed
    L-74 HC 350 4-bbl 1968–70 — confirmed
    L-77 HC 400 police performance engine 1968 B-07 confirmed
    (Delta GT) 390 hp 455 4-bbl w/dual exhaust — "Delta GT" engine option 1969 Delta/Delta Custom/Royale; option code not given in sources (became W-33 in 1970). The 1969 442 Info Kit uses no W-33 code (W-33 first appears 1970), corroborating the code gap single-source (code gap) ⛭ GM Heritage — 1969 Oldsmobile 442 Info Kit
    B-01 / B-07 Police Apprehender w/HD suspension 1969 Delta 88 / Delta 88 Custom only in 1969 confirmed
    J-55 HD brakes (police usage) 1968–72 Replaces J-56 confirmed
    G71 HD driveshaft 1968 Police (forum-documented) single-source
    N11 Police exhaust system 1968 Forum-documented usage single-source
    T60 HD 70-amp battery 1968 — confirmed
    V02 HD radiator 1968 — confirmed
    U-21 / U-22 Rocket Rally Pack / Safety Sentinel + Rally Pack combo 1968–69 U-22 forum-documented confirmed / single-source
    U90 / U91 Roof flasher wiring (incl. roof reinforcement) 1968–69 Police single-source
    Y-72 HD engine cooling 1968–69 — confirmed
    C-28 Dual-action tailgate 1969 Wagons confirmed
    M-38 TH-350 (350 4-bbl Delmont in 1968 per FAQ 88/98 page) 1968–69 CSM lists say A-body only 1969 — minor source conflict disputed

    Year 1970 — W-33

    Code Description Years Models/Notes Confidence
    W-33 "Olds 88 Performance Package" / 390 hp high-compression 455 4-bbl Rocket V-8, dual exhausts, 2.93 axle; M41 (TH-400) mandatory, Y72 HD cooling/alternator required for police use. Genuine RPO-style order code (Delta 88 $199.05; Custom/Royale $77.94), factory-billed as "390-hp Highway Patrol Rocket 455" 1970 All Delta 88 models w/ automatic confirmed ⛭ GM Heritage — 1970 Oldsmobile 442 Info Kit, p.9, p.184, p.237
    L-30 / L-31 LC 455 2-bbl / HC 455 4-bbl (365 hp) 1970–71 L31 requires M40 (TH-400) confirmed ⛭ GM Heritage — 1970 Oldsmobile 442 Info Kit, p.236
    L-65 LC 350 2-bbl 1970 — confirmed
    B-01 / B-07 Police Apprehender packages (B-07 = Highway Patrol suspension: HD front/rear springs, stabilizer bars, shocks, reinforced rear lower control arms) 1970 B-07 confirmed in kit; N.A. with F41/FG2/G65 confirmed ⛭ GM Heritage — 1970 Oldsmobile 442 Info Kit, p.184, p.234
    V-01 HD radiator 1970 — confirmed
    Y-72 HD cooling & generator (alternator) 1970–71 Mandatory with W33 for police use confirmed ⛭ GM Heritage — 1970 Oldsmobile 442 Info Kit, p.184, p.237
    Y-78 Demand wiper system 1970 — confirmed
    JL2 Power front disc brakes (floating caliper; power steering mandatory) 1969–72 N.A. with J55 or 3-speed manual confirmed ⛭ GM Heritage — 1970 Oldsmobile 442 Info Kit, p.236
    A-90 / AU3 Electric trunk latch / power door locks 1970–72 — confirmed
    A-74 HD front & rear seats (interlaced springs w/ foam padding) — police 1970 Delta 88 sedans confirmed ⛭ GM Heritage — 1970 Oldsmobile 442 Info Kit, p.184
    K-30 Automatic throttle control (cruise) 1970 Automatic trans + power brakes only confirmed ⛭ GM Heritage — 1970 Oldsmobile 442 Info Kit, p.236
    K-81 Delcotron 50-ampere alternator — police 1970 N.A. with C49 confirmed ⛭ GM Heritage — 1970 Oldsmobile 442 Info Kit, p.236
    M-55 Auxiliary oil cooler — automatic transmission (trailer hauling) 1970 — confirmed ⛭ GM Heritage — 1970 Oldsmobile 442 Info Kit, p.236
    G-91 Performance rear axle — 3.23 ratio 1970 350 CID engines only; trailer 1000–3500 lb confirmed ⛭ GM Heritage — 1970 Oldsmobile 442 Info Kit, p.235
    G-94 Performance rear axle — 2.93 ratio 1970 455 CID engines only; std w/ SM (manual) trans confirmed ⛭ GM Heritage — 1970 Oldsmobile 442 Info Kit, p.235
    U-11 Instrument cluster w/ certified speedometer — police 1970 N.A. with U15 confirmed ⛭ GM Heritage — 1970 Oldsmobile 442 Info Kit, p.236
    U-90 Roof-flasher wiring harness w/ roof-panel reinforcement — police 1970 Sedans confirmed ⛭ GM Heritage — 1970 Oldsmobile 442 Info Kit, p.184, p.236

    Years 1971–1976 — big-body era

    Code Description Years Models/Notes Confidence
    L-32 455 4-bbl 1971 — confirmed
    L-65 / L-74 350 2-bbl / 350 4-bbl 1971 — confirmed
    L-74 455 4-bbl (B-body) 1972 Code reused confirmed
    L-35 350 4-bbl (B-body; mandatory California) 1972 — confirmed
    B-07 Police Apprehender — Highway Patrol 1971–72 — confirmed
    Y-79 Ninety-Eight Regency package 1972–75 Per AutomotiveMileposts; Olds FAQ assigns Y-79 to Cutlass Salon/1970 SX — code reused across years disputed
    Y-61 Hurst Delta Royale (Hurst trim conversion of Delta 88 Royale) ~1973 Listed without year in CSM compilations single-source
    W-39 Hurst 3-speed floor shifter 1972 — confirmed
    UB-7 Safety Sentinel & trip odometer 1971–72 — confirmed
    U-41 Low-fuel indicator 1971–72 — confirmed
    N-47 Variable-ratio power steering 1971–72 — confirmed
    C-61 Comfortron automatic A/C 1972–76 — confirmed
    T-81 Headlamp-off delay (Night-Watch 1972) 1970–72 — confirmed
    Z49 Mandatory Canadian base equipment modification (export) 1972 — confirmed
    ACRS airbags Air Cushion Restraint System optional 1974–76 88/98 (and Toronado); Olds option code not documented in consulted lists single-source (code gap)
    — 455 std on 98 through 1976; last Delta convertible 1975 1971–76 Context confirmed

    Years 1977–1978 — downsized B/C body; Indy Pace Car

    Code Description Years Models/Notes Confidence
    W-44 Indy 500 Pace Car replica package ($914): silver/black scheme w/red accents, flat-black trim, aluminum hood & decklid, L80 403 V-8, N72 red Sport wheels, QZP GR70-15 RWL tires, N34 aluminum sport steering wheel, D35 sport mirrors 1977 Delta 88 Royale coupe (model N37) only; 2,401 built; paint 13-13 / 13-BB confirmed
    W-43 Pace Car decal package ($40): 2 door decals + 2 sail-panel Indy decals 1977 With W-44 single-source
    L80 403 4-bbl V-8 1977–79 88/98 confirmed
    LM1 350 Chevrolet 4-bbl (single exhaust) 1977–79 88 (engine-swap controversy era) confirmed (code), application single-source
    L34-era Olds 350 (VIN R) Olds 350 4-bbl std in Delta 88 1977–79 Same engine used for 1979 Hurst/Olds certification confirmed
    LF9 350 Olds diesel V-8 1978–82 88/98/Custom Cruiser confirmed

    Years 1979–1982

    Code Description Years Models/Notes Confidence
    LF9 350 diesel V-8 1979–82 88/98 confirmed
    LV8 / LC4 260 V-8 / 307 V-8 1979–82 307 becomes core gas V-8 from 1980 single-source
    LD5 231 Buick V6 1980–82 Base 88 single-source
    Y-codes (Royale Brougham, Regency trim) Trim packages; "Royale Brougham" interior debuts 1979 1979–82 Specific codes not documented in consulted sources gap

    Coverage gap: late-1970s/early-1980s full-size option codes are poorly covered by enthusiast compilations (which stop at 1972/1976); a factory order guide or dealer album is needed for completeness.

    Sources

    Factory kits (T1)

    Full-size 88/98 optional-equipment content mined from the Oldsmobile 442 Info Kits (which carry full-line factory material):

    • oldsmobile/1970_Oldsmobile_442_Info_Kit.txt — p.9 (three-package "SPECIAL NOTE" legend: W32/W33/W34); p.182–184 (Delta 88 price list & "Police and Special Use Equipment": W33, B07, A74, U90, Y72); p.234–237 ("1970 88-98 FACTORY INSTALLED OPTIONAL EQUIPMENT" table — W33 Performance Engine on p.237; L30/L31, M40/M41, M55, G80/G91/G94, J55/JL2, K30/K81, N33/N37/N42/N47, T81/T87, U11/U15, etc. on p.235–236). Note: the p.234–237 model-applicability grid is heavily OCR-garbled; only the code+description column was mined.
    • oldsmobile/1969_Oldsmobile_442_Info_Kit.txt — contains no W-33 code (W-33 first appears in 1970), corroborating the 1969 "Delta GT" engine code gap.