Significant loss of gas mileage on a 1999 Altima


#1

Very recently, I have noticed a significant loss of gas mileage on my 1999 Altima, I used to get 26-29 MPG until 3 weeks ago. All of a sudden I am now at 17. No engine lights have come on, and the car seems to be running fine, maybe a little more sluggish. I have replaced rotor, cap, plug wires, transmission fluid, fuel filter, switched gas stations, nothing has seemed to work. I thought it could be an O2 sensor or plugged catalytic converter, but again there have been no service lights displayed. Any suggestions? Thanks in advance. jb


#2

Spark plugs? Bad wheel bearings, stuck brake caliper, bad calculator, city driving, stolen gas, fuel injector jammed. I don’t believe you got 26 to 29 MPG. The overall MPG rating on a new Altima is 23. Consumer Reports. You should get at least 17 MPG.