See also:

Three-way catalyst
The three-way catalyst is an emission control device installed in the exhaust system. Exhaust gases in the three-way catalyst are burned at high temperatures to help reduce pollutants. WARNING: ...

Under the Hood
Sentra 2.0 models come with one engine and two transmission choices. Mechanical features include: 140-horsepower, 2.0-liter four-cylinder with 147 pounds-feet of torque Six-speed manual or contin ...

Increasing fuel economy
● Accelerate slowly and smoothly. Maintain cruising speeds with a constant accelerator position. ● Drive at moderate speeds on the highway. Driving at high speed lowers fuel economy. ...