The 23-year-old has scored three goals in 11 games since he joined the League Two club back in October.
Oliver's contract with Crewe is due to expire in the summer.
Mansfield currently sit in 20th place in the table, four points clear of the relegation zone. They return to action on Saturday with the visit of Exeter City.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Port Vale | 17 | 10 | 4 | 3 | 25 | 17 | 8 | 34 |
| 2 | Walsall | 16 | 9 | 4 | 3 | 30 | 17 | 13 | 31 |
| 3 | Crewe AlexandraCrewe | 16 | 8 | 5 | 3 | 20 | 14 | 6 | 29 |
| 4 | Doncaster RoversDoncaster | 17 | 8 | 5 | 4 | 22 | 18 | 4 | 29 |
| 5 | Notts County | 17 | 7 | 7 | 3 | 23 | 15 | 8 | 28 |
| 6 | MK Dons | 16 | 8 | 3 | 5 | 27 | 19 | 8 | 27 |
| 7 | AFC Wimbledon | 16 | 8 | 2 | 6 | 25 | 14 | 11 | 26 |
| 8 | Chesterfield | 17 | 6 | 7 | 4 | 30 | 20 | 10 | 25 |
| 9 | Grimsby Town | 17 | 8 | 1 | 8 | 19 | 26 | -7 | 25 |
| 10 | Bradford CityBradford | 16 | 6 | 5 | 5 | 21 | 17 | 4 | 23 |
| 11 | Gillingham | 16 | 7 | 2 | 7 | 17 | 14 | 3 | 23 |
| 12 | BarrowBarrow | 17 | 6 | 4 | 7 | 17 | 16 | 1 | 22 |
| 13 | Fleetwood TownFleetwood | 14 | 5 | 6 | 3 | 20 | 15 | 5 | 21 |
| 14 | Cheltenham TownCheltenham | 17 | 6 | 3 | 8 | 22 | 25 | -3 | 21 |
| 15 | Salford City | 16 | 5 | 6 | 5 | 15 | 18 | -3 | 21 |
| 16 | Newport CountyNewport | 17 | 6 | 3 | 8 | 19 | 26 | -7 | 21 |
| 17 | Harrogate TownHarrogate | 17 | 6 | 3 | 8 | 16 | 23 | -7 | 21 |
| 18 | Accrington StanleyAccrington | 16 | 4 | 6 | 6 | 22 | 26 | -4 | 18 |
| 19 | Bromley | 16 | 3 | 8 | 5 | 19 | 21 | -2 | 17 |
| 20 | Colchester UnitedColchester | 16 | 3 | 8 | 5 | 19 | 22 | -3 | 17 |
| 21 | Tranmere RoversTranmere | 16 | 4 | 5 | 7 | 10 | 20 | -10 | 17 |
| 22 | Swindon TownSwindon | 17 | 2 | 7 | 8 | 20 | 28 | -8 | 13 |
| 23 | Morecambe | 17 | 3 | 4 | 10 | 17 | 29 | -12 | 13 |
| 24 | Carlisle UnitedCarlisle | 17 | 3 | 4 | 10 | 14 | 29 | -15 | 13 |
| > League Two Full Table | |||||||||
