thumb|The 1932 Indianapolis 500-winning Wetteroth
Wetteroth was an American racing car constructor, owned and operated by California-based Texan Louis "Curly" Wetteroth. Wetteroth cars won four Indianapolis 500s (1932, 1935, 1938, 1941) and competed in one FIA World Championship race (1950 Indianapolis 500).
Indianapolis 500 results
{| class="wikitable"
! Season
! Driver
! Grid
! Finish
! Points
! Note
! Report
|-
! 1932
| Fred Frame
|align=center| 27
|style="background:#FFFFBF;" align=center| 1
| 600
|
| Report
|-
! 1933
| Fred Frame
|align=center| 3
|align=center| 29
|
|
| Report
|-
! 1935
| Kelly Petillo
|align=center| 22
|style="background:#FFFFBF;" align=center| 1
| 600
| Gilmore Speedway Special
| Report
|-
!rowspan=3| 1936
| Ted Horn
|align=center| 11
|style="background:#DFDFDF;" align=center| 2
|
|
|rowspan=3| Report
|-
| Doc MacKenzie
|align=center| 4
|style="background:#FFDF9F;" align=center| 3
|
|
|-
| Louis Tomei
|align=center| 8
|align=center| 27
|
|
|-
!rowspan=3| 1937
| Ted Horn
|align=center| 32
|style="background:#FFDF9F;" align=center| 3
|
|
|rowspan=3| Report
|-
| Ken Fowler
|align=center| 29
|align=center| 19
|
|
|-
| Kelly Petillo
|align=center| 20
|align=center| 20
|
|
|-
!rowspan=3| 1938
| Floyd Roberts
|align=center| 1
|style="background:#FFFFBF;" align=center| 1
| 600
| Burd Piston Ring Special
|rowspan=3| Report
|-
| Ted Horn
|align=center| 6
|align=center| 4
|
|
|-
| Kelly Petillo
|align=center| 21
|align=center| 22
|
|
|-
!rowspan=4| 1939
| Frank Wearne
|align=center| 17
|align=center| 9
|
|
|rowspan=4| Report
|-
| Herb Ardinger<br>Frank Brisko<br>Mel Hansen
|align=center| 9
|align=center| 17
|
|
|-
| Kelly Petillo
|align=center| 24
|align=center| 18
|
|
|-
| Floyd Roberts
|align=center| 23
|align=center| 23
|
|
|-
!rowspan=4| 1940
| Mauri Rose
|align=center| 3
|style="background:#FFDF9F;" align=center| 3
|
|
|rowspan=4| Report
|-
| Mel Hansen
|align=center| 5
|align=center| 8
|
|
|-
| Kelly Petillo
|align=center| 13
|align=center| 21
|
|
|-
| Cliff Bergere
|align=center| 6
|align=center| 27
|
|
|-
!rowspan=4| 1941
| Floyd Davis<br>Mauri Rose
|align=center| 17
|style="background:#FFFFBF;" align=center| 1
| 600
| Noc-Out Hose Clamp Special (shared)
|rowspan=4| Report
|-
| Cliff Bergere
|align=center| 7
|align=center| 5
|
|
|-
| Al Putnam<br>Louis Durant
|align=center| 31
|align=center| 12
|
|
|-
| Kelly Petillo
|align=center| 19
|align=center| 27
|
|
|-
!rowspan=3| 1946
| Joie Chitwood<br>Sam Hanks
|align=center| 12
|align=center| 5
|
|
|rowspan=3| Report
|-
| Billy Devore
|align=center| 31
|align=center| 10
|
|
|-
| Cliff Bergere<br>Rex Mays
|align=center| 1
|align=center| 16
|
|
|-
!rowspan=3| 1947
| Duke Dinsmore<br>Billy Devore
|align=center| 27
|align=center| 10
|
|
|rowspan=3| Report
|-
| Roland Free
|align=center| 12
|align=center| 17
|
|
|-
| Joie Chitwood
|align=center| 22
|align=center| 22
|
|
|-
!rowspan=2| 1948
| Duane Carter
|align=center| 29
|align=center| 22
|
|
|rowspan=2| Report
|-
| Mike Salay
|align=center| 31
|align=center| 30
|
|
|-
!rowspan=2| 1949
| Jim Rathmann
|align=center| 21
|align=center| 11
|
|
|rowspan=2| Report
|-
| Troy Ruttman
|align=center| 18
|align=center| 12
|
|
|-
!rowspan=2| 1950
| Jim Rathmann
|align=center| 28
|align=center| 24
|
|
|rowspan=2| Report
|-
| Bob Sweikert
|align=center colspan=2| DNQ
|
|
|}