IndyCar drivers Will Power and Scott Dixon, who rank first and second in the points chase, will face 10-spot starting grid penalties for this week's race in Milwaukee after blowing their engines testing at Iowa.
IndyCar director of engine development Trevor Knowles says Dixon blew an engine Tuesday morning testing on Iowa's .875-mile oval, while Power's went out later in the day.
IndyCar has mileage minimums before teams can change engines, and neither Power nor Dixon had reached those yet.
The setback shouldn't be bad for either driver, though, since there is usually room to pass on Milwaukee's oval.
Takuma Sato and Josef Newgarden also have to serve penalties this weekend because they didn't refit their Indy practice engines when their racing engines recently expired.
