2018 Melbourne 400
The 2018 Melbourne 400 was a motor racing event for the Supercars Championship that was held on the weekend of 22 to 25 March 2018. The event was run at the Melbourne Grand Prix Circuit in Melbourne, Victoria, and marked the first running of the Melbourne 400. It was the second event of sixteen in the 2018 Supercars Championship and consisted of two races of 130 kilometres, and two races of 70 kilometers. The races were run in support of the 2018 Australian Grand Prix and marked the first time that the Supercars support races would be a points-paying round of the Supercars Championship.
Results
Practice
Race 3
Qualifying
;Notes- – Todd Hazelwood, although his best time exceeded the specified qualifying time cut-off, the Stewards gave him permission to race.
Race
Championship standings after Race 3
;Drivers Championship| Driver | Gap | |||
| 1 |  Shane van Gisbergen | 380 | ||
| 2 |  David Reynolds | 322 | -56 | |
| 2 | 3 | Scott McLaughlin | 307 | -73 |
| 4 | Chaz Mostert | 290 | -90 | |
| 2 | 5 | James Courtney | 286 | -94 |
;Teams Championship
| Team | Gap | |||
| 1 | 1 | Triple Eight Race Engineering | 574 | |
| 1 | 2 | Walkinshaw Andretti United | 522 | -52 |
| 3 | Tickford Racing | 509 | -65 | |
| 1 | 4 | DJR Team Penske | 492 | -82 |
| 1 | 5 | Erebus Motorsport | 434 | -140 |
- Note: Only the top five positions are included for both sets of standings.
Race 4
Qualifying
;Notes- – James Golding received a 5-place grid penalty for impeding Craig Lowndes during qualifying.
Race
- – Jack Le Brocq received a 15-second Time Penalty for Careless Driving, causing contact with James Courtney.
Championship standings after Race 4
| Driver | Gap | |||
| 1 | Shane van Gisbergen | 420 | ||
| 1 | 2 | Scott McLaughlin | 353 | -67 |
| 1 | 3 | David Reynolds | 345 | -75 |
| 4 | Chaz Mostert | 324 | -96 | |
| 5 | James Courtney | 301 | -119 |
;Teams Championship
| Team | Gap | |||
| 1 | Triple Eight Race Engineering | 664 | ||
| 2 | 2 | DJR Team Penske | 581 | -83 |
| 3 | Tickford Racing | 571 | -93 | |
| 2 | 4 | Walkinshaw Andretti United | 561 | -103 |
| 5 | Erebus Motorsport | 473 | -191 |
- Note: Only the top five positions are included for both sets of standings.
Race 5
Qualifying
;Notes- – Todd Hazelwood received a 5-place grid penalty for impeding Lee Holdsworth during qualifying.
Race
- – Anton de Pasquale received a 5-second post-race Time Penalty for Careless Driving, failing to leave room and causing Rick Kelly lost 4 positions.
Championship standings after Race 5
| Driver | Gap | |||
| 1 | Shane van Gisbergen | 464 | ||
| 2 | Scott McLaughlin | 393 | -71 | |
| 3 | David Reynolds | 387 | -77 | |
| 4 | Chaz Mostert | 376 | -88 | |
| 5 | James Courtney | 375 | -89 |
;Teams Championship
| Team | Gap | |||
| 1 | Triple Eight Race Engineering | 800 | ||
| 2 | 2 | Walkinshaw Andretti United | 735 | -65 |
| 3 | Tickford Racing | 687 | -113 | |
| 2 | 4 | DJR Team Penske | 667 | -133 |
| 1 | 5 | Brad Jones Racing | 602 | -198 |
- Note: Only the top five positions are included for both sets of standings.
Race 6
Qualifying
;Notes- – James Courtney and Shane van Gisbergen, although their best time exceeded the specified qualifying time cut-off, the Stewards gave them permission to race.
Race
- – Cameron Waters received a 5-second Time Penalty for Careless Driving, causing contact with Anton de Pasquale.
- – Lee Holdsworth received a Pit-Lane Penalty equivalent Time Penalty for a breach of the Safety Car Restart procedures.
Championship standings after Race 6
| Driver | Gap | |||
| 1 | Shane van Gisbergen | 486 | ||
| 1 | 2 | David Reynolds | 437 | -49 |
| 1 | 3 | Scott McLaughlin | 425 | -61 |
| 4 | Chaz Mostert | 416 | -70 | |
| 1 | 5 | Scott Pye | 397 | -89 |
;Teams Championship
| Team | Gap | |||
| 1 | Triple Eight Race Engineering | 865 | ||
| 2 | Walkinshaw Andretti United | 772 | -93 | |
| 3 | Tickford Racing | 745 | -120 | |
| 4 | DJR Team Penske | 733 | -132 | |
| 5 | Brad Jones Racing | 672 | -193 |
- Note: Only the top five positions are included for both sets of standings.