Ive noticed that lately ive been gettin worse gas milage and sluggish performance out of my ss. Its really cold where i live so i know that has some effect on my gas milage, but ive seen 4 to 5 mpg less then normal. Could my plugs be fouling?

 

mines been doing the same. i have a 2.2 though. i have 28,000 with original plugs. i think thats bad.

 

It is normal to see your MPG lower in the winter months when it is cold. 4 - 5 MPG lower sounds about the norm.

 

pull your plugs and look

 

okay...n00b ?

whats the norm mileage before changing plugs?

 

there is no "norm" per se. everyone will be different, depends on mods, driving habits, gas you use, etc.