Terverifikasi Administratif dan Faktual oleh Dewan Pers
Para pebalap MotoGP akan kembali turun pada sesi FP3, FP4, dan kualifikasi yang digelar pada Sabtu, 7 April 2018.
Berikut hasil lengkap latihan bebas kedua (FP2) GP Argentina:
| POS | PEBALAP | TIM | WAKTU LAP |
| 1 | Marc Marquez | Repsol Honda | 1'39.395 |
| 2 | Cal Crutchlow | LCR Honda | 1'39.799 |
| 3 | Tito Rabat | Avintia Racing | 1'40.346 |
| 4 | Andrea Iannone | Suzuki Ecstar | 1'40.455 |
| 5 | Dani Pedrosa | Repsol Honda | 1'40.494 |
| 6 | Maverick Vinales | Movistar Yamaha | 1'40.510 |
| 7 | Valentino Rossi | Movistar Yamaha | 1'40.577 |
| 8 | Alex Rins | Suzuki Ecstar | 1'40.592 |
| 9 | Alvaro Bautista | Angel Nieto Team | 1'40.766 |
| 10 | Aleix Espargaro | Aprilia Racing | 1'40.800 |
| 11 | Scott Redding | Aprilia Racing | 1'40.839 |
| 12 | Jack Miller | Pramac Racing | 1'40.842 |
| 13 | Danilo Petrucci | Pramac Racing | 1'40.863 |
| 14 | Johann Zarco | Yamaha Tech 3 | 1'40.974 |
| 15 | Bradley Smith | Red Bull KTM | 1'41.198 |
| 16 | Hafizh Syahrin | Yamaha Tech 3 | 1'41.257 |
| 17 | Jorge Lorenzo | Ducati | 1'41.334 |
| 18 | Takaaki Nakagami | LCR Honda | 1'41.357 |
| 19 | Karel Abraham | Angel Nieto Team | 1'41.784 |
| 20 | Franco Morbidelli | Marc VDS | 1'41.832 |
| 21 | Pol Espargaro | Red Bull KTM | 1'41.867 |
| 22 | Thomas Luthi | Marc VDS | 1'41.898 |
| 23 | Xavier Simeon | Avintia Racing | 1'42.242 |
| 24 | Andrea Dovizioso | Ducati | 1'42.973 |
| Ket: Nama dengan huruf tebal adalah pebalap yang sementara lolos ke kualifikasi 2 | |||