My opinion would be to leave the roof as is,and go after the wake.I'm going to try and give you a link.It's a photo of a Rabbit with a similar roofline and completely attached flow,and then you'll see the enormous wake that's robbing you at the gas pump.--------------------------------------------------------
http://ecomodder.com/forum/member-ae...ere-money.html
MODERATOR EDIT: Added by cfg83 :