Marco Andretti jumps to top of Indianapolis 500 speed chart on busiest day of practice

Scott Dixon, of New Zealand, climbs out of his car during practice for the Indianapolis 500 auto race at the Indianapolis Motor Speedway in Indianapolis, Monday, May 13, 2013. (AP Photo/Darron Cummings) (The Associated Press)

Helio Castroneves, of Brazil, left, talks with four-time Indy 500 champion Rick Mears during practice for the Indianapolis 500 auto race at the Indianapolis Motor Speedway in Indianapolis, Monday, May 13, 2013. (AP Photo/Darron Cummings) (The Associated Press)

Marco Andretti posted the fastest Indianapolis 500 practice speed of the month Monday, turning a fast lap of 225.100 mph on the 2.5-mile oval.

It was the second straight day an Andretti Autosport driver held the top spot. Colombia's Carlos Munoz, a rookie, was the fastest driver Sunday.

Warmer temperatures and brighter skies created much better conditions from the first two days of practice at Indy, and it showed. Andretti was and three-time Indy winner Helio Castroneves each topped 225 mph. The Brazilian posted a lap of 225.075 mph as he tries to become the fourth member of the four-time winners club at Indy.

Defending series champion Ryan Hunter-Reay was third at 224.386. Australia's Will Power was fourth at 223.784 and Panther Racing's J.R. Hildebrand was fifth at 223.624.