Will Power led the way in the pre-qualifying practice at 227.377mph.
Speeds are picking up ahead of qualifying, but weather has threatened all day.
Unlike the previous two days, 'Fast Friday' went without incident.
The six hours of practice Thursday went incident-free, with one big exception...
In the draft, drivers put up the fastest speeds of the month today.
Helio Castroneves is now the fastest man in Indy at 227.514mph.
Once the army of jet driers finished the tedious task of making the surface of IMS ready for race cars, most took the opportunity to test their new aero kits.
A Ganassi 1-2 in the opening Long Beach practice on Friday was followed by a Penske 1-2-3 in the following session.
The track may be different, but the results are the same ... Chevrolet is fast.
Graham Rahal topped the charts.
Team Penske has not slowed down following their 2014 championship.
Tough competition in Milwaukee this weekend.
Sebastien Bourdais: "We had a great weekend (at Toronto) and finally capitalized on the pace and promises we've had coming into the season..."
IndyCar took to the hills of Mid-Ohio today for two practice sessions ahead of tomorrows on track activity.