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2017 Cadillac CT6 Plug-In — 2.0L 4-cyl, CVT automatic, RWD
This 2017 Cadillac CT6 Plug-In (2.0L 4-cyl, CVT automatic, RWD) takes premium gasoline. PREMIUM
26
MPG combined (23 city / 29 hwy)
$2,950
est. fuel cost / year (EPA, 15k mi)
144 g/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 and Electricity · class: Midsize Cars · retrieved 2026-06-14.