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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    W41 Single-source

    Oldsmobile · Regular Production Option

    Engine, 2.3L L4, DOHC, high output, W41 (Quad 4)

    Years 1991 Models 1
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    Documented applications

    Calais — N-body (1985–1991)
    • 1991 Single-source

      190 hp, Quad 442, 5 speed manual only with a 3.94 final drive; the Calais article's engine list dates the W41 car to 1991 and the Quad 4 article lists the Calais 442 for 1990–1991, so only 1991 is claimed; not independent of each other

    This page aggregates every documented appearance of W41 in the Oldsmobile reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.