So I have a question I am hoping someone has some insights on. I have a 98 GTP and an 06 GTP. The 98 has the series II engine and I can pretty consistently avg 30 mpg on the highway (if I limit the super charger use). I have been disappointed in the 06 with the series III engine as I cant seem to get more than 26 MPG. Anyone know what the difference is? What can I change on the 06 to get it on par witht the 98?
Also I am curious to hear what kind of mileage yall are getting with your cars.
Thanks
Tex