In 2008, the tyre regulations stipulate that the two dry tyre specifications must be visibly distinguishable from each other. At the Spanish Grand Prix, the medium compound Bridgestone Potenza tyre was marked with a white line in the second from inside groove. 

Team / Race Driver     Tyre Choice by Stint*:Soft/Medium

Scuderia Ferrari           
Kimi Raikkonen              Medium-Medium-Hard
Felipe Massa                Medium-Medium-Hard

BMW Sauber F1 Team                  
Nick Heidfeld               Medium-Medium-Medium-Hard
Robert Kubica               Medium-Medium-Hard

ING Renault F1 Team                 
Fernando Alonso             Medium-Medium-DNF
Nelson Piquet               Medium-DNF

AT&T Williams                       
Nico Rosberg                Medium-Medium-DNF
Kazuki Nakajima             Medium-Medium-Hard

Red Bull Racing                     
David Coulthard             Medium-Medium-Hard-Medium
Mark Webber                 Medium-Medium-Hard

Panasonic Toyota Racing             
Jarno Trulli                Medium-Medium-Hard-Hard
Timo Glock                  Medium-Medium-Hard-Hard

Scuderia Toro Rosso                 
Sebastien Bourdais          Medium-DNF
Sebastian Vettel            Medium-DNF

Honda Racing F1 Team                
Jenson Button               Medium-Medium-Hard
Rubens Barrichello          Medium-Medium-Medium-DNF

Super Aguri F1 Team                 
Takuma Sato                 Medium-Medium-Hard
Anthony Davidson            Medium-DNF

Force India Formula One             
Adrian Sutil                Medium-DNF
Giancarlo Fisichella        Medium-Medium-Hard

Vodafone McLaren Mercedes                    
Lewis Hamilton              Medium-Medium-Hard
Heikki Kovalainen           Medium-DNF

* Teams do not necessarily change tyres at pitstops
* Includes drive through penalties