2015 Cadillac CTS EPA Fuel Economy Summary

The 2015 Cadillac CTS delivers an EPA-certified 14–24 MPG combined (12–20 city / 18–30 highway depending on engine and drivetrain) across 7 configurations. Estimated annual fuel costs range from $2,550 to $5,450.

Combined MPG
14–24 MPG
55% city / 45% highway weighted
City MPG
12–20 MPG
Stop-and-go urban cycle
Highway MPG
18–30 MPG
Sustained open-highway test
Annual Fuel Cost
$2,550–5,450
EPA estimate @ 15,000 miles/yr

Official EPA Fuel Economy Ratings by Configuration (7 Variants)

Laboratory certification test values across engine, transmission, and drivetrain permutations

Configuration / Model Powertrain Drivetrain Transmission City Highway Combined Annual Fuel Cost CO2 (g/mi)
CTS Sedan Regular 2L 4-Cyl Gas Rear-Wheel Drive Automatic (S6) 20 MPG 30 MPG 24 MPG $2,550 —
CTS Sedan Regular 3.6L 6-Cyl Gas Rear-Wheel Drive Automatic (S8) 18 MPG 28 MPG 22 MPG $2,800 —
CTS Sedan Premium 3.6L 6-Cyl Gas Rear-Wheel Drive Automatic (S8) 16 MPG 24 MPG 18 MPG $4,200 —
CTS Premium 6.2L 8-Cyl Gas Rear-Wheel Drive Manual 6-spd 14 MPG 19 MPG 16 MPG $4,750 —
CTS Premium 6.2L 8-Cyl Gas Rear-Wheel Drive Automatic (S6) 12 MPG 18 MPG 14 MPG $5,450 —
CTS Sedan AWD Regular 2L 4-Cyl Gas All-Wheel Drive Automatic (S6) 19 MPG 27 MPG 22 MPG $2,800 —
CTS Sedan AWD Regular 3.6L 6-Cyl Gas All-Wheel Drive Automatic (S6) 18 MPG 26 MPG 21 MPG $2,950 —
EPA Test Methodology: Fuel economy estimates are determined by vehicle manufacturers in accordance with EPA regulations (40 CFR Part 600) and verified by EPA laboratories. Estimates assume 15,000 miles per year of driving (55% city, 45% highway) at prevailing fuel and electricity prices.

Deterministic Fuel Cost & Consumption Benchmarks

Standardized annual energy consumption and operating cost metrics based on 15,000 annual miles

Fuel Cost per 25 Miles

$3.65–$6.25

Based on $3.50 per gallon regular gasoline

Annual Fuel Consumption

625–1071 Gallons

Estimated annual energy units needed for 15,000 miles

5-Year Fuel Cost vs Avg Vehicle

Official EPA Benchmark

Compared to the average new vehicle over 5 years

Related Official Reports for 2015 Cadillac CTS

Cross-reference safety ratings, owner defect complaints, and recall campaigns

Official US Government Data Provenance

Fuel economy ratings, electric range figures, and energy cost estimates on this page are retrieved directly from the United States Environmental Protection Agency (EPA) and U.S. Department of Energy (FuelEconomy.gov) certified vehicle database.

Local Production Store Compiled: August 2026 • Deterministic Audited Dataset • Zero Dynamic External API Runtime Latency.