In wheels.ca, one motorist share his experience on his 1999 Mercury Cougar two-door hatchback which he noticed a considerable drop in fuel economy in city driving, although highway gas consumption did not change that much.

According to the technician, Tony Prochilo, there are many variables to consider when this happen. It can be based on vehicle speed, outside temperature, weather and traffic conditions, tire pressures and regular engine maintenance including tune-ups.

Another important factor, according to Prochilo is the car’s oxygen sensor. He said that along with improving vehicle emission, the oxygen sensor will also boost engine performance.

To remedy this problem, Prochilo advises to replace the existing oxygen sensor, for an ineffective sensor may cause the problem stated above.

This entry was posted on Tuesday, October 16th, 2007 at 2:13 am and is filed under Oxygen Sensor Maintenance. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.