| 1958 Round Australia Trial | |
| Native Name: | Mobilgas Trial |
| Previous Round: | 1958 Round Australia Trial (Ampol) |
| Next Round: | 1964 Round Australia Trial |
| Rallybase: | Sydney Melbourne |
| Startdate: | 20 August |
| Enddate: | 7 September 1958 |
| Stages: | 31 |
| Overallkm: | 16250 |
| Surface: | Tarmac and Gravel |
| Driver1: |  Eddie Perkins Arthur Smith |
| Teamsstart: | 67 |
| Teamsfinish: | 34 |
The 1958 Round Australia Trial, officially the Mobilgas Trial was the ninth running of the Round Australia Trial. The rally took place between 20 August and 7 September 1958. The event covered 16,250 kilometres around Australia. It was won by Eddie Perkins and Arthur Smith, driving a Volkswagen 1200.
| Entrant | Drivers | Car | Penalties (Points) | |||
|---|---|---|---|---|---|---|
| 1 | 2 | E.B. Perkins | Eddie Perkins Arthur Smith | Volkswagen 1200 | 11 | |
| 2 | 48 | Greg Cusack | Greg Cusack Pat Lawless | Volkswagen 1200 | 55 | |
| 3 | 23 | G.J. Coles and Company | Dave Anderson Laurie McAlister | Holden FE | 58 | |
| 4 | 68 | S.G. McGlashan | Stan McGlashan W. Leabeater | Volkswagen 1200 | 68 | |
| 5 | 53 | H.R. Smith | Harry Smith David Orr | 117 | ||
| 6 | 8 | L.L. Fiebig | Lance Fiebig Jim Claridge | 125 | ||
| 7 | 72 | Regal Motors | Malcolm Brooks Frank Tate | Standard Vanguard Phase III | 154 | |
| 8 | 21 | Team Firth and Young | Harry Firth Kevin Young | Volkswagen 1200 | 155 | |
| 9 | 31 | Leith Car Sales | Harvey Gunn Desmond Smith | Volkswagen 1200 | 158 | |
| 10 | 3 | Team Murray and Murison | Bill Murray Bill Murison | Chrysler Royal V8 AP1 | 194 | |
| 11 | 25 | Team James, Williams and Calnan | Clarrie James Jack Williams Albert Calnan | Holden FE | 394 | |
| 12 | 71 | Ken Tubman David Berman | Škoda 440 | 429 | ||
| 13 | 69 | Nalder's Garage | Wes Nalder Jack Nalder | Ford Zephyr Mark II | 480 | |
| 14 | 63 | Elaine Lenaghan | Elaine Lenaghan Len Lenaghan Reg Lenaghan | Holden FE | 520 | |
| 15 | 41 | J.N. Mather | Joseph Mather Ron Jones H. McKinnon | Volkswagen 1200 | 658 | |
| 16 | 57 | Parkers' Colac | Arthur Parker W. Stacey John Parker | Holden FC | 695 | |
| 17 | 29 | Lorna and Keith Gamble | Keith Gamble Lorna Gamble John Hayward | Rover 90 | 786 | |
| 18 | 59 | R.J Holden | Bob Holden Matt Walton | Peugeot 403 | 794 | |
| 19 | 62 | O.G. Roberts | Tom Quill Sidney Chapman Owen Roberts | Holden FC | 820 | |
| 20 | 42 | C.R. Turner Motors | Claude Turner Laurie Turner | Hillman Minx Mark II | 904 | |
| 21 | 58 | John and Peter Perkins | John Perkins Peter Perkins | Peugeot 403 | 911 | |
| 22 | 49 | Team Cullen and Garard | Pat Cullen John Garard | Holden FE | 939 | |
| 23 | 60 | Wally Eremin | Wally Eremin J. Alexander | Hillman Minx Mark II | 1,012 | |
| 24 | 37 | Vince Brown Norm Saville | Škoda 440 | 1,018 | ||
| 25 | 19 |  Yasuhara Nanba Bruce Wilkinson Kazuaki Okuyama | Datsun 1000 | 1,129 | ||
| 26 | 22 | C.G. Chappell | Chester Chappell Rob Mills | Holden FE | 1,157 | |
| 27 | 65 | H.E. and F.N. Pitts Motors | Frank Pitts Kevin Higgs | Hillman Minx Mark II | 1,183 | |
| 28 | 55 | Victorian Police Motor Sports Club | Alan Sharpley Kevin O'Neill Jerry Merrett | Ford Zephyr Mark II | 1,227 | |
| 29 | 5 | Aubrey Melrose | Aubrey Melrose John Cummins | Austin Westminster A90 | 1,255 | |
| 30 | 54 | Jack Murray | Jack 'Milko' Murray John Pomroy Bert Madden | Chrysler Royal V8 AP1 | 1,295 | |
| 31 | 44 | Major Warwick Max Watson | Škoda 440 | 1,486 | ||
| 32 | 36 | Team Hose and Hillman | David Hose John Hillman | Morris Minor 1000 | 1,545 | |
| 33 | 27 | Leslie Young | Leslie Young Harry Harris | Morris Minor 1000 | 1,780 | |
| 34 | 14 | Yoshitane Oya Allan Gibbons Yonekichi Minawa | Datsun 1000 | 2,003 | ||
| Source:[1] [2] [3] | ||||||