For 2011, the Cadillac STS doesn’t see as many updates as much as it sees a prominent deletion. This year, the 320-horsepower, 4.6-liter V-8 has been discontinued. The move makes sense, considering the powertrain provided little extra oomph compared with its modern V-6 counterpart and had far worse fuel economy (15/24 mpg city/highway).
Now, the only available powertrain is a 302-hp, 3.6-liter V-6 mated to a six-speed automatic transmission in either rear- or all-wheel drive.The V-6 gets 18/27 mpg with either rear- or all-wheel drive.
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