Team Penske's Will Power pushed Chevrolet to the top of the Indianapolis 500's practice speed chart.
His fast lap of 232.672 mph was the best Friday and the best all week. Another Chevy driver, Josef Newgarden of Ed Carpenter Racing, finished second at 232.344.
Nobody else topped 232 on a day drivers were given a boost of about 30 horsepower to prepare for qualifying, which will be held Saturday and Sunday on the historic 2.5-mile oval.
But the Hondas, which have been strong in practice at Indy, claimed the next nine spots. Canada's James Hinchcliffe was the top Honda driver at 231.972. He competes with Schmidt Peterson Motorsports.
All five Andretti Autosport drivers also finished in the top 10, led by Colombia's Carlos Munoz at 231.952.