F1.com reports a confirmation of McLaren receiving Renault power units for the 2018 season and beyond due to Toro Rosso going with Honda PUs. Carlos Sainz will reportedly driver for Renault next season "on loan" from STR. Pierre Gasly, the 2016 GP2 champion and Red Bull reserve driver, will most likely move into the STR seat for the 2018 season.
Toro Rosso’s Carlos Sainz has inked a deal sending him to Renault Sport Formula 1 in a three team power unit swap bid. McLaren’s not-so-secret disdain for Honda PUs and Honda and FIA’s desire to keep Honda in the sport have resulted in our first play in the 2017 silly season. Toro Rosso will now reportedly run Honda power units with McLaren taking units from Renault; with the latter wanting a deal sweetener and found it in the young STR driver Sainz. Scuderia Toro Rosso dealt with a bit of a rift earlier in the season with Sainz claiming something needed to happen to keep him at Red Bull Racing’s B-team. Autosport reports:
“The Sainz-Renault deal has cleared the way for Toro Rosso to complete a switch to Honda engines, with the Faenza-based team also taking a supply of McLaren gearboxes for the to use with the Japanese company's power unit.
Once the Toro Rosso-Honda agreement has been finalised, then the final issue to be sorted will be McLaren's Renault contract - although that will then likely be a formality.
It is thought that all the deals will be completed by the start of next week, to ensure that announcements can be made ahead of the Singapore Grand Prix.”*
Stay tuned to F1merica, updates are sure to come.