Kammala jumla mai zuwa: Andretti ya yi tseren dare na farko a Homestead-Miami Speedway, tseren farko na kakar 2008, tare da kammala na biyu a bayan Scott Dixon. Ya kuma jagoranci mafi yawan zagaye na tseren - yana jagorantar 85 - kuma ya sami ƙarin maki uku. A St. Petersburg, Andretti ya karya rabin shaft a kan motarsa yana kokarin barin pits, wanda ya sa ya yi ritaya. A tseren na uku na kakar wasa a Motegi, Japan, Andretti ya juya a zagaye na farko na tseren. A cikin
2008 Indianapolis 500, Andretti ya gama na uku, bayan ya jagoranci da dama. A lokacin tseren, ya wuce abokin aikinsa, Tony Kanaan, wanda daga baya ya yi karo da bango, yana zargin Andretti.