I've done 3 across in a Nissan Sentra, Pontiac Grand AM and a Dodge Neon. I have two Radians and a Combi Cocorro, and they have all fit really well. I also did the two radians with a Graco Snugride (no base) in the Sentra. It was harder w/ the infant seat in the middle bc I had to slip the baby under the seatbelt each time, and I would not want to do that on a regular basis.
Wife to Jeremy (2/06)
Mama to Nella (10/07), Ezra (9/09), and Eisley Marie born April 13, 2012 in the water