For me, I used the Light Speed Company Rocket at WIllow Springs (prize car) but didn't really like it, although you don't need to pit with it. For Silverstone, Brands Hatch, Suzuka and Apricot Hill, I used my trusty Nissan GT-R R35 TC which I'd bought for the IA GT-R Mission. All the races required only one pit stop, though at Brands I had to coast the last lap. Closest event i won by, 10 seconds I think...Brands I won by well over a minute despite coasting. As for the LMP races, I tried Le Mans with the 2J as I have that but struggled as couldn't see a thing and it didn't like the wet. I think most people use the Rocket for those races as, while it may get passed on the straights, it makes up for it in cornering and not requiring pit stop. Hope that helps