Q: well at canada they were 7. 1. Hamilton 2. Kubica 3. Barrichello 4. Glock 5. Trulli 6 Heidfeld 7. DC have there been more than 7?
A: Cool question. Six and seven leaders has happened fairly often. The 1971 Italian GP had 8 leaders: Regazzoni, Peterson, Stewart, Cevert, Hailwood, Siffert, Amon & Gethin. Leave this open until Wednesday morning and I'll give you a definitive answer! I'm off to bed now. EDIT I think that's it, 1971 Italian GP with 8 leaders. I've found lots of examples of 6 and 7 leaders, but no other 8s. Even the Indy 500s which counted for the F1 championship didn't have more than 6 leaders.