Richie Stanaway continued his impressive form in Formula Renault 3.5 testing at Aragon to top the second day for the Gravity-Charouz Racing squad.
The 2011 German F3 champion, who was also fastest on day one, was the only driver to dip below the 1m43s bracket, his best effort of 1m42.810s putting him almost three tenths clear of Arthur Pic (Epic Racing) in second.
Estonian Kevin Korjus finished third fastest for Tech 1 Racing, with whom he won three races and finished sixth in this year's championship.
Marco Sorensen, who finished runner-up to Stanaway in German F3, ended the day fourth fastest in the second Gravity-Charouz car, with 2011 British F3 champion Felipe Nasr (Carlin) less than two tenths down the road in fifth.
Will Stevens (P1 Motorsport) and Lucas Foresti (Tech 1 Racing) finished sixth and seventh ahead of Sergey Afanasiev, who joined the BVM Target squad after sitting out the opening day.
Carlos Huertas (Fortec Motorsports) and Laurens Vanthoor (ISR) rounded out the top ten, both drivers lapping within eight tenths of Stanaway's benchmark.
The second ISR car was piloted by 2010 Formula 2 champion Dean Stoneman, his first competitive test since being diagnosed with testicular cancer.
Day Two times:
Pos Driver Team Time Gap 1. Richie Stanaway Gravity-Charouz 1m42.810s 2. Arthur Pic Epic 1m43.106s + 0.296s 3. Kevin Korjus Tech 1 1m43.155s + 0.345s 4. Marco Sorenson Gravity-Charouz 1m43.204s + 0.394s 5. Felipe Nasr Carlin 1m43.380s + 0.570s 6. Will Stevens Tech 1 1m43.432s + 0.622s 7. Lucas Foresti Tech 1 1m43.503s + 0.693s 8. Sergey Afanasiev BVM Target 1m43.555s + 0.745s 9. Carlos Huertas Fortec 1m43.556s + 0.746s 10. Laurens Vanthoor ISR 1m43.610s + 0.800s 11. Robin Frijns Comtec 1m43.708s + 0.898s 12. Giovanni Venturini Draco 1m43.724s + 0.914s 13. Walter Grubmuller P1 1m43.793s + 0.983s 14. Zoel Amberg Pons 1m43.795s + 0.985s 15. Daniel Juncadella Pons 1m43.802s + 0.992s 16. Vittorio Ghirelli Comtec 1m43.875s + 1.065s 17. Nick Yelloly Comtec 1m43.901s + 1.091s 18. Jazeman Jaafar KMP/Carlin 1m43.944s + 1.134s 19. Sergio Canamasas Carlin 1m43.988s + 1.178s 20. Adrian Quaife-Hobbs Epic 1m44.010s + 1.200s 21. Andrea Roda Draco 1m44.073s + 1.263s 22. Nicolai Martsenko BVM Target 1m44.339s + 1.529s 23. Maxime Jousse KMP 1m44.708s + 1.898s 24. Dean Stoneman ISR 1m44.997s + 2.187s