Estate Wagon — B-body (1983–1990)

Oldsmobile 307 V8, the standard engine; Wikipedia's Oldsmobile V8 article lists the LV2 (VIN code Y) for the Buick Estate Wagon through 1990, and its Buick Estate article names the 307 as the standard engine; gnttype.org's 1984 to 1987 Buick VIN tables print it in the B-body block that includes the Estate wagon, a second source; 1983 and 1989 from Wikipedia alone, so the row stays single-source; shared B-body code; cited from the Chevrolet Caprice kit (1987, 1988, 1990), where it is the Caprice wagon's engine

350 cu in; Wikipedia's Buick Estate article names the LF9 diesel among the generation's engines and says the 5.7 litre diesel was available through 1985; gnttype.org's 1984 and 1985 Buick VIN tables print it in the B-body block that includes the Estate wagon, a second source; shared B-body code; cited from the Chevrolet Caprice kit (1983, 1985)

matched to the unit by meaning: Wikipedia's Buick Estate article names a 4 speed automatic among the generation's transmissions but prints no code; the kit pages print MXO (1985 MX0); the 1984 and 1986 weight pages list it for the Caprice wagon among other models, the 1987 page as standard on the Caprice wagon, the 1988 guide's wagon page as a no-charge item, and the 1990 guide's axle-ratio chart pairs it with LV2; 1983 is left out because the 1983 Caprice kit shows the overdrive automatic without a code, and 1989 because the 1989 kit's listed pages do not print it; shared B-body code; cited from the Chevrolet Caprice kit