Oldsmobile straight-6 engine

It was a conventional side-valve engine of varying capacities and at stages was shared with GMC.

In 1911 the displacement increased to 706.0 cubic inches (11,569 cc) while remaining at 60 bhp.

The 185 cu in (3.03 L) was used by the Oldsmobile F-Series for the 1927 model year only and it was basically an over-bored 169.

It used a 3 3/16" bore and 4 1/8" stroke, had a compression ratio of 5.2:1 and when released in 1928 made 55 bhp at 2700 RPM.

[1] It used a 3 5/16" bore and 4 1/8" stroke and on its introduction in 1932 had a compression ratio of 5.3:1 and made 74 bhp at 3200 RPM.

For 1933 the capacity was increased to 221 but reverted to the original displacement the following year, with a higher compression ratio of 5.7:1 made 84 bhp at 3200 RPM.