2005 Cadillac STS Gas Mileage (MPG)
Unlike other fuel economy surveys, TrueDelta's Real-World Gas Mileage Survey includes questions about how and where a car was driven. So you can get an idea of the Cadillac STS's real-world MPG based on how and where you drive a car.
More about the
Cadillac STS
Cadillac STS Gas Mileage
| Year | Body/Powertrain | flat, hilly, or mountainousLand | driving style: very light to "lead foot"Foot | A/C use: none to heavyA/C | constant stop and goTraf % | many stops per mileCity % | stop every mile or twoSub % | fairly steady speedHwy % | Hwy Spd | MPG |
| 2005 | 4dr Sedan 320-horsepower 4.6L V8 5-speed shiftable automatic RWD |
flat | med | light | 0 | 0 | 10 | 90 | 60 | 18.9 |
| flat | light | light | 0 | 10 | 70 | 20 | 70 | 20.0 | ||
| flat | lead | light | 0 | 0 | 50 | 50 | 70 | 22.7 | ||
| 2005 | 4dr Sedan 320-horsepower 4.6L V8 5-speed shiftable automatic RWD |
flat | med | light | 0 | 3 | 43 | 53 | 67 | 20.5 |
| Averages | flat | med | light | 0 | 3 | 43 | 53 | 67 | 20.5 | |
| With the 320-horsepower 4.6L V8 engine, 5-speed shiftable automatic transmission, and rear-wheel drive, 2005 Cadillac STS fuel economy has been averaging
20.5 MPG (miles per gallon). The 2005 Cadillac STSs in this analysis were driven mostly on the highway at an average speed of 67 miles per hour (about 53 percent of the miles driven). The rest of the miles were in the suburbs (43 percent), in the city (3 percent), and in heavy traffic (0 percent). In addition the average 2005 Cadillac STS in this analysis was driven on flat terrain with a medium foot and the AC on only some of the time. |
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| Year | Body/Powertrain | flat, hilly, or mountainousLand | driving style: very light to "lead foot"Foot | A/C use: none to heavyA/C | constant stop and goTraf % | many stops per mileCity % | stop every mile or twoSub % | fairly steady speedHwy % | Hwy Spd | MPG |
| 2005 | 4dr Sedan 320-horsepower 4.6L V8 5-speed shiftable automatic AWD |
flat | med | hvy | 0 | 10 | 10 | 80 | 70 | 15.4 |
| 2005 | 4dr Sedan 320-horsepower 4.6L V8 5-speed shiftable automatic AWD |
flat | med | hvy | 0 | 10 | 10 | 80 | 70 | 15.4 |
| Averages | flat | med | hvy | 0 | 10 | 10 | 80 | 70 | 15.4 | |
| With the 320-horsepower 4.6L V8 engine, 5-speed shiftable automatic transmission, and all-wheel drive, the 2005 Cadillac STS has been averaging
15.4 MPG (miles per gallon). The 2005 Cadillac STSs in this analysis were driven mostly on the highway at an average speed of 70 miles per hour (about 80 percent of the miles driven). The rest of the miles were in the city (10 percent), in the suburbs (10 percent), and in heavy traffic (0 percent). In addition the average 2005 Cadillac STS in this analysis was driven on flat terrain with a medium foot and the AC on most or all of the time. |
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| Year | Body/Powertrain | flat, hilly, or mountainousLand | driving style: very light to "lead foot"Foot | A/C use: none to heavyA/C | constant stop and goTraf % | many stops per mileCity % | stop every mile or twoSub % | fairly steady speedHwy % | Hwy Spd | MPG |
| 2005 | 4dr Sedan 255-horsepower 3.6L V6 5-speed shiftable automatic RWD |
flat | light | light | 5 | 20 | 30 | 45 | 60 | 21.0 |
| 2005 | 4dr Sedan 255-horsepower 3.6L V6 5-speed shiftable automatic RWD |
flat | light | light | 5 | 20 | 30 | 45 | 60 | 21.0 |
| Averages | flat | light | light | 5 | 20 | 30 | 45 | 60 | 21.0 | |
| With the 255-horsepower 3.6L V6 engine, 5-speed shiftable automatic transmission, and rear-wheel drive, 2005 Cadillac STS gas mileage has been averaging
21.0 MPG (miles per gallon). The 2005 Cadillac STSs in this analysis were driven mostly on the highway at an average speed of 60 miles per hour (about 45 percent of the miles driven). The rest of the miles were in the suburbs (30 percent), in the city (20 percent), and in heavy traffic (5 percent). In addition the average 2005 Cadillac STS in this analysis was driven on flat terrain with a light foot and the AC on only some of the time. |
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If you are not a TrueDelta member, you can see only five Cadillac STS MPG fuel economy averages for each powertrain. Log in or join us to see them all.
What Our Members Are Saying about the Real 2005 Cadillac STS MPG
| 2005 Cadillac STS Fuel Economy: Cons | ||
| Year | Body/Powertrain | Comment |
| 2005 | 4dr Sedan 320-horsepower 4.6L V8 5-speed shiftable automatic AWD |
This car is thirsty. I live in flat country and I get 15 mpg with 80% highway traffic. I only get 19 mpg on trips. It probably needs a 6th speed overdive for the highway. |
