I probably still have that old Car Craft edition with the 45 mpg Turbo Regal. It had some very fancy chip programming for it's day, and it was for some kind of contest they were running for the fastest car, best fuel economy and possibly some kind of handling autocross type testing. I'd have to dig it up.
45 mpg is possible if you lean the heck out of it, higher cruise timing, make sure the TC is locked up, draft behind other cars, and coast as much as possible. The owner (Heath Elmer?) admitted to doing this stuff in the article as I recall. Pretty sure he won the event.
Billy
Montgomery Village, MD