Two-time Formula One champion Fernando Alonso needed about one hour of track time today to pass his rookie orientation test for the 101st Running of the Indianapolis 500 presented by PennGrade Motor Oil.

“It was fun,” Alonso said during a break on pit road after his No. 29 McLaren-Honda-Andretti car had completed 51 laps just before noon ET. “At this moment, everything looks good. Now it’s time to start the real thing.”

Alonso made quick work of the three rookie orientation phases with 10 laps at 205-210 mph, 15 laps at 210-215 mph and 15 laps at 215-plus mph.

Andretti Autosport teammate Marco Andretti shook down the car, which is painted in classic Team McLaren papaya orange. McLaren is returning to the Indy 500 on May 28 for the first time in 38 years.

Practice for the Indianapolis 500 begins May 15 with qualifying on May 20-21, so the 35-year-old Spaniard has a lot to learn in a short time. He’s still had to juggle F1 commitments, which has meant an overabundance of travel. Alonso was unable to start Sunday’s Russian Grand Prix due to engine issues and will compete in the Spanish Grand Prix next week.

Although he ranks sixth on F1’s all-time win list with 32 victories and celebrated world championships in 2005 and 2006, Alonso hasn’t won a race since 2013 and his interest in enhancing his racing resume will require him to drive faster than ever before at 230 mph down the front straightaway at Indianapolis Motor Speedway.

A day after preparing in a racing simulator, Alonso said his confidence grew with each passing lap. When the test concluded, shortly after 3 p.m. ET, he had completed 110 laps with a top speed of 222.548 mph.

“I think it’s a good way to start, to build speed,” he said. “It was difficult at (the) beginning to reach the minimum speed. The next stages felt good, not because of the speed but because of the laps. You’re able to fine-tune the lines; upshift, downshift, which gears to use in the corner.

“The simulator is quite realistic. You have the first impression of how it’s going to be. But the real car is a unique feeling. When you have to go flat out in the corner, it’s not the same in the simulator as in the real car.”

Andretti Autosport CEO Michael Andretti, who will field six cars in the race including defending champion Alexander Rossi, liked what he saw from Alonso’s initial experience.

“That was great,” Andretti said. “He did everything he was supposed to do. Now it's time to go play a bit. So far, everything is really perfect. We had one trim we started with, so we have a reference of where we need to go.

“He gets it. He's one of the best in the world and you can see why. He had a little bit of understeer in that run and he adjusted his line because of the understeer. He's the real deal. I think he's going to be really strong this month.”

Three generations of Andretti racers – Mario, Michael and Marco – as well as Rossi and 2003 Indy 500 winner Gil de Ferran were among those giving Alonso advice. Mario won the 1969 Indy 500, Michael has celebrated four Indy 500 victories as an owner in addition to leading the most laps (431) without winning as a driver and Marco was a rookie runner-up in 2006 and is in his 12th season as a Verizon IndyCar Series regular.

“The team has been amazingly helpful,” Alonso said. “Running alone is quite OK. We'll see in the next weeks. So far a good experience. Now is the real deal.”

Marco Andretti said cooler track conditions, with ambient temperatures in the low 50s, combined with Alonso the only driver on track provided an ideal setting for the initiation. Alonso kept churning out laps amid a threat of afternoon showers as darker clouds drifted over the speedway.

“With this level of downforce, this is like race downforce, when there’s no traffic and you’re by yourself, it’s just stuck,” Marco Andretti said. “The front and rear are stuck right now, which is what you want for the first run.”

And what of sorting out the input from so many voices?

“He’ll have to learn by fire from a lot of it,” Marco said. “But he’s asking the right questions.

“He’ll be fine. He’s a race car driver. He’ll leave today pretty confident.”