The Oldsmobile Delta 88 front side marker bulb uses 194 or 194NA size, while the rear side marker bulb uses 194 or 168 size. The replacement chart covers vehicle production years spanning 1968 to 1991 with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 194 bulb is the dominant type across both the front and rear side marker positions of the Oldsmobile Delta 88, appearing across the majority of model years covered in the specifications.
The 194 is an ANSI-standard miniature wedge bulb in the T10 form factor, rated at 12 volts and 3.78 watts, and is recognized under both US and Canadian standards.
The 194NA shares the same T10 form factor, voltage, and wattage as the standard 194 but is distinguished by natural amber-tinted glass, which produces a colored output without relying on a tinted lens.
The Oldsmobile Delta 88 front side marker for 1969 and 1989 specifies the 194NA, meaning those two model years require the amber-glass variant rather than the clear 194.
Substituting a standard 194 for a 194NA in positions that specify the amber variant would alter the color output of the marker light if the housing lens is clear rather than amber-tinted.
The 168 bulb is also a T10 miniature wedge type operating at 12 volts, but its wattage is rated at 4.9 watts, making it a higher-output bulb than the 194 despite sharing the same physical form factor.
The rear side marker on the Delta 88 for the 1977 model year specifies the 168 rather than the 194, setting it apart from every other model year listed for that position.
Because the 168 and 194 share the T10 wedge base, they are physically interchangeable in terms of socket fit, but their differing wattage ratings mean they are not electrically equivalent replacements for one another.
All three bulb types listed in the specifications, the 194, 194NA, and 168, conform to ANSI standards recognized in both the United States and Canada.
The front side marker specifications for the Delta 88 span from 1969 to 1991, while the rear side marker specifications extend one year further back, beginning with the 1968 model year.