The 1982 Castrol 400 was an endurance race for touring cars complying with CAMS Group C regulations. The event was held at the Sandown Raceway circuit in Victoria on 12 September 1982 over 109 laps, totalling 337.9 km.The field was divided into four classes according to engine capacity:
There were 52 starters in the event, which was the second round of the 1982 Australian Endurance Championship and the second round of the 1982 Australian Endurance Championship of Makes.
Allan Moffat's win in his Peter Stuyvesant International Mazda RX-7 was the first outright win by a car from a Japanese manufacturer in the annual Sandown endurance race.
| Position | Drivers | No. | Car | Entrant | Class | Laps | |
|---|---|---|---|---|---|---|---|
| 1 |  Allan Moffat | 43 | Mazda RX-7 | Peter Stuyvesant International | D | 109 | |
| 2 |  Allan Grice | 4 | Holden VH Commodore SS | Re-Car Racing | D | 109 | |
| 3 | Dick Johnson | 17 | Ford XE Falcon | Palmer Tube Mills | D | 108 | |
| 4 | John Harvey Gary Scott | 25 | Holden Commodore VH SS | Marlboro Holden Dealer Team | D | 108 | |
| 5 | Terry Shiel | 37 | Mazda RX-7 | Eurocars Mazda | D | 107 | |
| 6 | Charlie O'Brien Clive Benson-Brown | 11 | Holden VC Commodore | Sound Wave Discos | D | 106 | |
| 7 | Garry Rogers[1] Ron Wanless | 16 | Holden VH Commodore SS | Re-Car Racing | D | 106 | |
| 8 | Fred Gibson | 56 | Nissan Bluebird Turbo | Nissan Motor Company | C | 106 | |
| 9 | Greg Toepfer Ken Matthews | 19 | Holden VH Commodore SS | Citizen Watches | D | 105 | |
| 10 |  Jim Richards | 31 | BMW 635 CSi | JPS Team BMW | D | 105 | |
| 11 | John Goss | 10 | Jaguar XJS | John Goss Racing | D | 104 | |
| 12 | Peter Janson | 3 | Holden VH Commodore SS | Cadbury Schweppes | D | 103 | |
| 13 | Bill O'Brien Brian Sampson | 36 | Ford XD Falcon | Everlast Batteries Service | D | 103 | |
| 14 | Peter McLeod Peter Dane | 40 | Mazda RX-7 | Strongbow Racing Team | D | 103 | |
| 15 | John French Alf Grant | 23 | Ford XD Falcon | Alf Grant Racing | D | 102 | |
| 16 | John Duggan | 34 | Mazda RX-7 | John Duggan | D | 101 | |
| 17 | Steve Harrington Garth Wigston | 21 | Holden VH Commodore SS | Roadways Racing | D | 98 | |
| 18 | Graeme Bailey Steve Land | 61 | Toyota Celica | Chickadee Chicken | B | 98 | |
| 19 | Gerry Burges | 33 | Mazda RX-7 | Gerry Burges | D | 97 | |
| 20 | Peter Beninca Joe Beninca | 66 | Alfa Romeo GTV | Beninca Motors | B | 96 | |
| 21 | James Myhill John Bundy | 49 | Mazda RX-3 | J. Myhill | C | 95 | |
| 22 | Jim Faneco Allan Gough | 68 | Isuzu Gemini ZZ | Country Dealer Team | A | 94 | |
| 23 | Ian Burrell Rob Shute | 76 | Mitsubishi Colt | Eastside Mitsubishi | A | 94 | |
| 24 | Peter Boston | 74 | Isuzu Gemini PF50 | P. Boston | A | 93 | |
| 25 | Ian Wells | 97 | Mitsubishi Lancer | I. Wells | A | 91 | |
| 26 | Martin Power | 59 | Triumph Dolomite Sprint | Jag Parts | B | 91 | |
| 27 | Brian Winsall | 87 | Isuzu Gemini | 1.6 Litre Touring Car Association | A | 90 | |
| 28 | Tony Mulvihill | 64 | Ford Escort | Bob Holden Motors | B | 80 | |
| 29 | Lester Smerdon | 83 | Isuzu Gemini PF50 | L. Smerdon | A | 75 | |
| Other starters included the following: | |||||||
| DNF | Steve Masterton | 2 | Ford XE Falcon | Masterton Homes P/L | D | ||
| DNF | Peter Brock | 05 | Holden VH Commodore SS | Marlboro Holden Dealer Team | D | ||
| DNF | Bob Morris | 7 | Ford XE Falcon | Alan Jones | D | ||
| DNF | Colin Bond Kevin Bartlett | 9 | Chevrolet Camaro Z28 | Nine Network Racing Team | D | ||
| DNF | David Parsons | 13 | Holden VH Commodore SS | Cadbury Schweppes | D | ||
| DNF | Murray Carter | 18 | Ford XE Falcon | Murray Carter John Sands Racing | D | ||
| DNF | Warren Cullen | 22 | Holden VH Commodore SS | Cullen Automotive Industries | D | ||
| DNF | Alan Jones | 27 | Mazda RX-7 | Alan Jones | D | ||
| DNF | Allan Taylor Kevin Kennedy | 32 | Holden VC Commodore | Scotty Taylor Racing | D | ||
| DNF | Bernie Stack Keith Poole | 38 | Holden VC Commodore | Gawler Body Works | D | ||
| DNF | Gregg Hansford Lucio Cesario | 42 | Mazda RX-7 | Peter Stuyvesant International | D | ||
| NC | John Craft Barry Seton | 52 | Ford Capri | Hulcraft Autos | C | ||
| DNF | George Fury | 55 | Nissan Bluebird Turbo | Nissan Motor Company | C | ||
| DNF | Bob Holden | 63 | Ford Escort | Bob Holden Motors | B | ||
| DNF | Alexandra Surplice Doug Clark | 71 | Toyota Corolla Levin | A. Surplice | A | ||
| DNF | Craig Bellman | 78 | Isuzu Gemini | C. Bellman | A | ||
| DNF | Arthur Abrahams | 90 | Ford Escort | B | |||