Szisz 's Renault suffered a broken rear suspension on the tenth lap .
Szisz 's lead was so great ( more than 30 minutes ) Szisz he could afford to drive cautiously with the damage .
Szisz 's Renault suffered a broken rear suspension on the tenth lap , but his lead was so great ( more than 30 minutes ) that he could afford to drive cautiously with the damage .