A big talking point for the weekend in Formula 1, however, will be the engine updates bought by Ferrari, Renault, and Honda with Mercedes being the only supplier not to bring an updated power unit. The relative performance of the Renault and Honda will be particularly interesting as Red Bull Racing is set to pick between the two for 2019.
The second practice session, meanwhile, was briefly interrupted by a red flag following Renault's Carlos Sainz hitting the wall exiting Turn 7. The Spaniard hit the wall backward and bounced off it with quite some force. He was able to make it back to the pits, but the debris he left behind necessitated the track being cleaned. McLaren's Stoffel Vandoorne caused a brief virtual safety car phase after hitting the Turn 9 wall.
Source : http://www.thedrive.com/accelerator/21410/verstappen-stays-on-top-in-second-free-practice-for-2018-canadian-grand-prix