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1990 Cadillac Commercial Chassis — 4.5L 8-cyl, Automatic 4-spd, FWD
This 1990 Cadillac Commercial Chassis (4.5L 8-cyl, Automatic 4-spd, FWD) takes premium gasoline. PREMIUM
16
MPG combined (14 city / 22 hwy)
$4,800
est. fuel cost / year (EPA, 15k mi)
—
tailpipe CO₂
The EPA lists this trim as premium because that's the fuel the manufacturer specified for its mileage test. Many such engines will run on regular with slightly lower power and MPG — but check your owner's manual to see whether premium is required or just recommended.
EPA fuel type: Premium · class: Special Purpose Vehicle 2WD · retrieved 2026-06-14.