yeah there was the 5 engines at the end of the 09 season
Edit:
2009.. 8 races with 5 engines = engine to last an avg 1.6 race length
i wonder if Edwards/Toseland did 7 races with 2 engines = engine to last an avg 3.5 race length
(similar to what is needed in 2010)
and were openly doing Yams...