On the entry list for the opening 1988 ATCC round, i have the Brock M3's entered under HDT Racing P/L ... so the "Mobil 1 Racing" banner was probably adopted during the season. Advantage must have had an ownership of some sort in the '92/'93 team, as Frazer wanted to go it alone after Brock left for HRT... didn't come to fruition though of course.
About the Nissan team at Symmons, the reason only Richards ran was that the team was on skeleton staff at the meeting, with team members left at home to concentrate on the building of the GTR. Skaife was at Symmons though, turning some laps practice (source: The Great Race 1990/91)
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