- 1983–1986 Single-source
the OHV engine enlarged to 2 liters for 1983; Wikipedia's Firenza article (infobox and Engines list) and its 122 engine article give it to the Firenza 1983–1986
LQ5 Single-source
Also documented for BuickCadillacChevroletPontiac
Documented applications
This page aggregates every documented appearance of LQ5 in the Oldsmobile reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.