In GT3, the
Gillet Vertigo only takes one stop in the Laguna enduro...but i don't know about GT4.
Actually in the 1000 Miles! events, a
Lotus Elan S1 only takes one pit stop at Paris-Opera. And the 'ring as well.
I know i HATE that!

GT1 was the BEST here...it included not only all the Ai cars, but detailed their
horsepower and weight as well in an easy-to-read list. It's just ridiculous this got dropped and makes subsequent GT games feel just a tad arcadish. Real-life pit crew, race marshalls, and drivers usually know what their competition is boasting..they have to. It's an effort to keep others from cheating.