Mercedes admits engine reliability still an “unknown”

Racing Point's Sergio Perez and Williams' Robert Kubica, both of whom suffered failures of their Phase 3 units at Spa, will stick with high mileage Phase 2s in Italy, while Lewis Hamilton, Valtteri Bottas, Lance Stroll and George Russell will use the Phase 3 units.
On Friday in Belgium, all six Mercedes-powered cars were equipped with the latest Phase 3 engines, which were scheduled to last ...Keep reading