Honda Civic Repair Question
Asked on June 26, 2006
Gas mileage
1999 Honda Civic XL, 106000 miles. Have taken good care of vehicle. constant oil changes, filters ect. Have recently lost gas mileage, about 6 to 10mpg. New spark plugs, increased power but nothing to gas mileage. Vehicle runs very good. Maybe o2 sensor? Also great site, lots of information.
Answer
Replied on June 27, 2006
I wouldn't mess with the O2 sensors yet. They can be a factor but there are other things to look at. Timing, tire pressure, dragging brakes, air cleaner, etc
Good old basic stuff.