Among those cars was Latvala's Ford, with the Finn taking the opposite strategy and starting at the back of the field to attempt to benefit from those before him clearing the roads of loose gravel.
Latvala's tactical gamble appeared to pay off in the day's first stage, but from there it was all the Citroens.
Hirvonen claimed the second stage and, despite finishing behind Loeb in the next three stages, still held a slim lead heading into the final three races of the day.
He increased that advantage by winning the sixth stage but Loeb took the final two to sit atop the standings.
"I am having so much fun and this is a really great battle with Seb to be exchanging times back and forward like we are,'' Hirvonen said.
Latvala's day turned from bad to worse on the penultimate stage when a mistake cost him four minutes and dropped him from third to ninth in the standings.
The Finn become tangled in a fence after an attempted cut on an inside corner went wrong and needed help from spectators to get going again.
Meanwhile, New Zealand's Hayden Paddon endured a mixed day in the Super-2000 class, easily leading the field through the eight stages before suffering gearbox issues during the latter stages.
The clutch on Paddon's Skoda wasn't operational by the day's end and he was left with only second and sixth gears, leaving him facing a potential penalty for being unable to make it back to the Rally's headquarters in Auckland.
Paddon was confident of reaching the city and fixing the problems overnight despite some ``fun'' at traffic lights, but the possible five minute penalty will barely eat into his 25-minute lead over the other cars in the S-2000 class.