Covered 5k miles in my wrx in first 3 months.Considering ppp kit at 10 k service.I use my car for work and need some reasonable fuel economy (i average about 27 mpg with a mixture of m/way ,town and broad blasts.what mpg can i expect with ppp fitted?

 

If you drive exactly the same you will probably get less MPG. IF you drivethe same speed you should get more. What I mean is that after the change if you enjoy a blast you'll just go much faster and drink more fuel. Thats what has happened to me anyway- currently 1 mpg below what I was getting before and enjoying every minute of it

 

MPG!! If you want goog mpg may I suggest a nice little Citroen C2 diesel!!!
dave