Date

Site

Course

Distance
(Miles)

Winner

Car

Speed
(mph)

Speed
(kph)

04/08/90

Phoenix

Oval

200

Rick Mears

Penske-Chevrolet

126.291

203.202

04/22/90

Long Beach

Road

158.650

Al Unser Jr.

Lola-Chevrolet

84.227

135.521

05/27/90

Indianapolis+

Oval

500

Arie Luyendyk

Lola-Chevrolet

185.981

299.243

06/03/90

Milwaukee

Oval

200

Al Unser Jr.

Lola-Chevrolet

133.670

215.075

06/17/90

Detroit

Road

155

Michael Andretti

Lola-Chevrolet

84.902

136.607

06/24/90

Portland

Road

199.890

Michael Andretti

Lola-Chevrolet

110.673

178.073

07/08/90

Cleveland

Road

198.400

Danny Sullivan

Penske-Chevrolet

112.483

180.985

07/15/90

Meadowlands

Road

176.470

Michael Andretti

Lola-Chevrolet

97.291

156.541

07/22/90

Toronto

Road

183.340

Al Unser Jr.

Lola-Chevrolet

75.997

122.279

08/05/90

Michigan

Oval

500

Al Unser Jr.

Lola-Chevrolet

189.727

305.271

08/26/90

Denver

Road

152

Al Unser Jr.

Lola-Chevrolet

71.243

114.630

09/02/90

Vancouver

Road

165.290

Al Unser Jr.

Lola-Chevrolet

77.345

124.448

09/16/90

Mid-Ohio

Road

200.250

Michael Andretti

Lola-Chevrolet

85.751

137.973

09/23/90

Elkhart Lake

Road

200

Michael Andretti

Lola-Chevrolet

106.192

170.863

10/07/90

Nazareth

Oval

200

Emerson Fittipaldi

Penske-Chevrolet

112.170

180.482

10/21/90

Laguna Seca

Road

185.980

Danny Sullivan

Penske-Chevrolet

103.556

166.622

+The Indianapolis 500 was USAC-sanctioned, but counted toward the PPG Indy Car World Series title.