Oldsmobile 88 License Plate Bulb Size

The Oldsmobile 88 license plate light requires bulb sizes 194, 67, or 63 depending on the specific version of the vehicle. Available data covers the range from 1950 to 1999.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
1992-1999	194
1954-1957	67
1950	63

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 8W.	67
ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 0.63W.	63

Other Locations

Additional Notes

The Oldsmobile 88 used three distinct license plate bulb types across its production span: the 194, the 67, and the 63.
The 194 bulb is a T10 miniature wedge type rated at 12V and 3.78W, conforming to ANSI standards for the US and Canada. Its wedge base design means it requires no separate socket retainer, as the bulb body itself locks into the housing.
The Oldsmobile 88 (1992-1999) used the 194 bulb for the license plate position across all model years in that range.
The 67 bulb is a single-filament type with a BA15s bayonet base, rated at 12V and 8W. It is described as a lower wattage variant of the 1156 bulb, sharing the same base type but drawing significantly less power.
The 88 used the 67 bulb for the license plate position during the 1954-1957 model years.
Because the 67 and 1156 share a BA15s bayonet base, physical fitment of a 1156 into a 67 socket is possible, but the wattage difference makes them non-interchangeable without risk of exceeding the circuit's design tolerance.
The 63 bulb carries a BA9s base, which is a smaller bayonet fitting than the BA15s used by the 67. These two base types are physically incompatible, and the bulbs cannot be substituted for one another.
The 63 bulb is rated at just 0.63W, making it the lowest-wattage bulb in these specifications by a considerable margin. The 1950 Oldsmobile 88 used this bulb for the license plate position.
The 194 wedge base and the BA9s base of the 63 are also physically incompatible, meaning no direct substitution is possible between the bulb types used in the 1950 model year and those used in the 1992-1999 range.
All three bulb types in these specifications conform to ANSI standards applicable in both the US and Canada.