I only use super in my roadster.
Have 20600 miles with flawless performance.
Made my own windscreen, looks very good.
Its a "hot" car but.....not quite enough room in the driver seat.
I'm 6 feet so, thats average for a guy.
The Porsche Boxster has just a tad more room.
I believe that dollar for dollar, the Xfire is a better buy and....soooo much more unique.

Bill G.