Team HRT had the two slowest times in qualifying and finished last in the standings, not counting the two drivers who didn't finish.
Pedro de la Rosa was 21st and Narain Karthikeyan was 22nd. The team is for sale and de la Rosa this week was forced to deny reports in Spain that the cars may be lacking spare parts and dangerous to drive.
"Five laps to the end, part of the carbon seat broke and I was afraid that I might have to retire, but I managed to adapt to the new driving position and we were able to get to the chequered flag, which was not only important for me but for the whole team," de la Rosa said. "Now it is time to look ahead and get ready for Brazil."
Team principal Luis Perez-Sala called the two-car finish important for team morale.
"It hasn't been easy, but everyone had done a fantastic job and I am very proud of this team and its members," Perez-Sala said.