- 1998 Factory-verified
GM prints this tire wording as OFB (letter O) in 15 lists, this one's among them, and as QFB in 8 (the 1998 Cutlass and Malibu lists and others); the code stays as this list prints it.
OFB Factory-verified
Also documented for BuickPontiac
Documented applications
This page aggregates every documented appearance of OFB in the Oldsmobile reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.