Australian IndyCar driver Will Power and New Zealand’s 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 during testing at Iowa.

IndyCar director of engine development Trevor Knowles says Dixon blew an engine on Tuesday morning testing on Iowa’s 1.41km 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 too detrimental 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.