That put the Danish driver three tenths clear of his closest competitors, who were once again the DS Mathershaw cars, solidifying the suspicions they'll be the ones to beat come Australia. Reserve driver Kip Maxwell set the second quickest time on a 1:15.331 with Olen Inamn third on a 1:15.511, both on the medium tyres.
Diego Campos' soft clad Ingram took the fourth fastest time - albeit over a second down on Halvosen's time - with Enrique Ruiz fifth on the medium tyres for Franklin, 2.3 seconds slower than the slowest DS Mathershaw car on the same tyres.
Judson Sikes sparked hope for North Star with the sixth fastest time on soft tyres ahead of Abel Osterhagen - impressive in his hard tyred Lopez - and the two soft clad FUN cars of Yrjana Vahasoyrinki and Carson Davenport.
Jarod Lindsey then led a train of times on the medium tyres, with Kiara Thunder nearly a second and a half down on the time she set yesterday for Ocelot, but still ahead of brother Marcus, who in turn pipped Downton team mate Nathaniel Powers.
At the back Douglas Bacon concentrated on hard tyre setup, while Westwood ran the hardest compound and propped up the time sheets - both for the third day in a row.
Conditions are expected to remain bright, sunny and warm for the conclusion of pre-season testing tomorrow, but will we see a fourth different team top the standings?