By Soup StaffWorldSBK Portugal FP4 Results 2018
| Pos. | Rider | Team | Bike | Time |
|---|---|---|---|---|
| 1 | Marco Melandri | Aruba.it Racing – Ducati | Ducati Panigale R | 1:41.601 |
| 2 | Jonathan Rea | Kawasaki Racing | Kawasaki ZX-10R | 1:41.666 |
| 3 | Michael van der Mark | Pata Yamaha Official WorldSBK | Yamaha YZF R1 | 1:42.275 |
| 4 | Xavi Fores | Barni Racing | Ducati Panigale R | 1:42.358 |
| 5 | Jordi Torres | MV Agusta Reparto Corse | MV Agusta 1000 F4 | 1:42.359 |
| 6 | Alex Lowes | Pata Yamaha Official WorldSBK | Yamaha YZF R1 | 1:42.458 |
| 7 | Tom Sykes | Kawasaki Racing | Kawasaki ZX-10R | 1:42.469 |
| 8 | Leon Camier | Red Bull Honda World Superbike | Honda CBR1000RR | 1:42.533 |
| 9 | Eugene Laverty | Milwaukee Aprilia | Aprilia RSV4 RF | 1:42.692 |
| 10 | Chaz Davies | Aruba.it Racing – Ducati | Ducati Panigale R | 1:42.762 |
| 11 | Lorenzo Savadori | Milwaukee Aprilia | Aprilia RSV4 RF | 1:42.984 |
| 12 | Loris Baz | Gulf Althea BMW Racing | BMW S1000 RR | 1:43.033 |
| 13 | Toprak Razgatlioglu | Kawasaki Puccetti Racing | Kawasaki ZX-10R | 1:43.088 |
| 14 | Jake Gagne | Red Bull Honda World Superbike | Honda CBR1000RR | 1:43.184 |
| 15 | Michael Ruben Rinaldi | Aruba.it Racing – Junior Team | Ducati Panigale R | 1:43.529 |
| 16 | Leandro Mercado | Orelac Racing Verdnatura | Kawasaki ZX-10R | 1:43.535 |
| 17 | Yonny Hernandez | Pedercini Racing | Kawasaki ZX-10R | 1:43.785 |
| 18 | Roman Ramos | GoEleven | Kawasaki ZX-10R | 1:44.086 |
| 19 | PJ Jacobsen | Triple M Honda World Superbike | Honda CBR1000RR | 1:44.514 |
| 20 | Jakub Smrz | Guandalini Racing | BMW S1000 RR | 1:45.086 |
