IndyCar officials announced 10 grid spot penalties for the four cars for this weekend's event at Sonoma, as well as an update regarding the status of fresh engines remaining for each team for the remaining three races of the season.

Facing penalties this weekend are Takuma Sato (will be using sixth engine at Sonoma); Sebastian Saavedra (unapproved engine change at Indianapolis); Justin Wilson (unapproved engine change between Mid-Ohio and Sonoma);and Simona De Silvestro (using seventh engine at Sonoma).

IndyCar rules state that each full-season entrant will be provided with no more than five fresh built engines throughout each year covered by an engine service agreement. Using more than five in a season will result in a penalty. Engines beyond the fifth fresh engine may be fresh or part-used.

The updated fresh engine list is as follows:

Car Team Driver Engine Count
2
 
Team Penske Ryan Briscoe Will use Engine 5 at Sonoma
3
 
Team Penske Helio Castroneves On Engine 5
4
 
Panther Racing JR Hildebrand On Engine 4 - 1 Engine Remaining
5
 
KV Racing Technology EJ Viso On Engine 4 - 1 Engine Remaining
6/7
 
Dragon Racing Katherine Legge &
Sebastien Bourdais
On Engine 4 - 1 Engine Remaining
8
 
KV Racing Technology Rubens Barrichello On Engine 4 - 1 Engine Remaining
9
 
Target Chip Ganassi Racing Scott Dixon On Engine 6
10
 
Target Chip Ganassi Racing Dario Franchitti On Engine 4 - 1 Engine Remaining
11
 
KV Racing Technology
w/ SH  
Tony Kanaan On Engine 4 - 1 Engine Remaining
12
 
Team Penske Will Power On Engine 5
14
 
AJ Foyt Enterprises Mike Conway On Engine 5
15
 
Rahal Letterman Lanigan Takuma Sato Will use Engine 6 at Sonoma
18
 
Dale Coyne Racing Justin Wilson Will use Engine 5 at Sonoma
19
 
Dale Coyne Racing James Jakes On Engine 4 - 1 Engine Remaining
20
 
Ed Carpenter Racing Ed Carpenter On Engine 4 - 1 Engine Remaining
22
 
Panther / Dreyer & Reinbold Oriol Servia On Engine 4 - 1 Engine Remaining
26
 
Andretti Autosport Marco Andretti On Engine 4 - 1 Engine Remaining
27
 
Andretti Autosport James Hinchcliffe On Engine 4 - 1 Engine Remaining
28
 
Andretti Autosport Ryan Hunter-Reay On Engine 5
38
 
Service Central
Chip Ganassi Racing
Graham Rahal On Engine 4 - 1 Engine Remaining
67
 
Sarah Fisher Hartman Racing Josef Newgarden On Engine 5
77
 
Schmidt Hamilton
HP Motorsports
Simon Pagenaud On Engine 5
78
 
Lotus-HVM Racing Simona de Silvestro Will use Engine 7 at Sonoma
83
 
Novo Nordisk
Chip Ganassi Racing
Charlie Kimball Will use Engine 5 at Sonoma
98
 
Bryan Herta Autosport
w/ Curb-Agajanian
 
Alex Tagliani On Engine 5