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Oldsmobile straight 8 engine

Olds straight 8 offering

1940s Oldsmobile Straight-8 engine

Oldsmobile produced a "multicylinder" straight-8 engine in the 1930s. This was the company's top engine choice from 1937 until the 1949 introduction of the Rocket V8.

257

The only displacement offered for the Olds straight-8 was 257 in³ (4.2 L). It was a conventional side-valve engine.