Motorola 300 1998 var ett race som var den sjätte deltävlingen i CART World Series säsongen 1998. Den kördes den 23 maj på Gateway International Raceway i Madison, Illinois. Alex Zanardi tog över mästerskapsledningen genom ett perfekt depåstopp i samband med den sista gulflaggen. Den tidigare mästerskapsledaren Greg Moore höll sig i högsta grad kvar i tätstriden, genom en tredjeplats.
| Plats
|
Förare
|
Team
|
Grid
|
Kvaltid
|
| 1
|
 Alex Zanardi
|
Chip Ganassi Racing
|
11
|
26,228
|
| 2
|
 Michael Andretti
|
Newman/Haas Racing
|
6
|
26,038
|
| 3
|
 Greg Moore
|
Forsythe Racing
|
1
|
25,757
|
| 4
|
 Jimmy Vasser
|
Chip Ganassi Racing
|
2
|
25,807
|
| 5
|
Scott Pruett
|
Patrick Racing
|
17
|
26,418
|
| 6
|
 Gil de Ferran
|
Walker Racing
|
12
|
26,279
|
| 7
|
Hélio Castroneves
|
Bettenhausen Motorsports
|
8
|
26,106
|
| 8
|
 Bobby Rahal
|
Team Rahal
|
20
|
26,654
|
| 9
|
 JJ Lehto
|
Hogan Racing
|
4
|
25,829
|
| 10
|
 Mark Blundell
|
PacWest Racing
|
18
|
26,493
|
| 11
|
Christian Fittipaldi
|
Newman/Haas Racing
|
14
|
26,304
|
| 12
|
P.J. Jones
|
All American Racing
|
21
|
26,656
|
| 13
|
Robby Gordon
|
Arciero-Wells Racing
|
13
|
26,297
|
| 14
|
Alex Barron
|
All American Racing
|
22
|
26,664
|
| 15
|
Patrick Carpentier
|
Forsythe Racing
|
16
|
26,364
|
| 16
|
Maurício Gugelmin
|
PacWest Racing
|
23
|
26,666
|
| 17
|
 Michel Jourdain Jr.
|
Payton/Coyne Racing
|
25
|
26,784
|
| 18
|
Adrián Fernández
|
Patrick Racing
|
10
|
26,219
|
| 19
|
 Al Unser Jr.
|
Marlboro Team Penske
|
9
|
26,205
|
| 20
|
André Ribeiro
|
Marlboro Team Penske
|
27
|
27,184
|
| 21
|
 Arnd Meier
|
Davis Racing
|
26
|
26,850
|
| 22
|
Max Papis
|
Arciero-Wells Racing
|
24
|
26,773
|
| 23
|
 Bryan Herta
|
Team Rahal
|
7
|
26,077
|
| 24
|
Tony Kanaan
|
Tasman Motorsports
|
3
|
25,815
|
| 25
|
 Dennis Vitolo
|
Payton/Coyne Racing
|
28
|
27,786
|
| 26
|
Paul Tracy
|
Team KOOL Green
|
15
|
26,332
|
| 27
|
Dario Franchitti
|
Team KOOL Green
|
5
|
26,028
|
| 28
|
Richie Hearn
|
Della Penna Motorsports
|
19
|
26,544
|
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