L80 ● Confirmed

Oldsmobile · Regular Production Option

403 CID V-8 (replaces 455)

Years 1977–79 Models 2

Also described as 403 4-bbl V-8403 V-8 (final year)

Documented applications

Full-Size 88 / 98 →

• 1977–79 ● Confirmed

  88/98

Toronado →

• 1977–78 ● Confirmed

  Standard

• 1979 ● Confirmed

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This page aggregates every documented appearance of L80 in the Oldsmobile reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.