- German Grand Prix
- Andretti consolidates lead with Hockenheim triumph
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July 30, 1978: Mario Andretti won the German Grand Prix at Hockenheim - his fourth win in six races - to further extend his commanding lead in the drivers' championship
- British Grand Prix
- Reutemann wins to reignite title race
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July 16, 1978: Ferrari's Carlos Reutemann injected some much-needed competition into the season with victory at the British Grand Prix, beating Niki Lauda after an action-packed race at Brands Hatch
- French Grand Prix
- Andretti opens up commanding lead
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July 2, 1978: Normal service was resumed at the Paul Ricard circuit as Mario Andretti secured his third win in four starts in the French Grand Prix in front of a record 100,000 spectators