Andretti Autosport will be using Chevrolet engines to power its cars in 2012, after the team announced that it has signed a deal with the engine manufacturer.

Andretti is the second big team to sign up with Chevrolet, with championship leaders Penske already having announced that it would be running with Chevrolet power plants from the start of next season, when new car and engine specifications come into force in IndyCar.

"We are very proud to announce that Andretti Autosport is now part of the Chevrolet family and that they will compete with Chevy's new twin-turbo V6 beginning in 2012," said Jim Campbell, Chevrolet's vice president of Performance Vehicles and Motorsports.

The deal will see the reunion of a successful partnership from IndyCar's past, as Mario and Michael Andretti together won 20 series races with Chevrolet power between 1987 and 1991. Mario Andretti gave Chevrolet their first series win at Long Beach in 1987, and Michael took eight wins in 1991 alone on his way to becoming series champion.

"I am so excited to work with Chevy once again," said Andretti. "We won 15 races and a championship with Chevy in just three years. The 1991 season was magical.

"Now, Andretti Autosport and our sponsors have the opportunity to win again with Chevrolet," he continued. "This will prove to be a tremendous association. Chevrolet is committed to motorsports and they are proven winners."

Andretti will be saying goodbye to Honda, who have been the sole engine supplier in IndyCar since the 2006 series after Chevrolet and Toyota decided to pull out. Andretti was keen to thank Honda for their six years together.

"All of us want to thank Honda for many good years together, including 39 wins, two wins at the Indy 500," he said. "Honda is largely responsible for providing a platform for multiple manufacturer competition to return and we are grateful for their contributions to the sport we love.

Honda itself has already signed up Chip Ganassi Racing, AJ Foyt Racing and Sam Schmidt Motorsports as customer teams for its engines, and are thought to be close to the maximum number of cars on the grid that they are able and willing to support.

That leaves the remaining teams having to decide whether to take the remaining spots on Chevrolet's dance card, or whether to risk a step into the unknown by opting for a Lotus engine.

British manufacturers Lotus entered the engine supply race late in the day and there are concerns about how far along their IndyCar engine development is, what resources they have available to them for the project, and whether it will be ready for teams for the start of the 2012 season.

They have not yet signed up or confirmed any teams that will be running their engines next year, with not even the KV Racing Technology team (which runs with Lotus sponsorship and with the iconic Lotus livery) yet committed to their engines.

Earlier today, Lotus announced that it will be behind Jean Alesi's bid to enter the 2012 Indianapolis 500 race in a Lotus-powered car, but the team that will provide the actual car and technical/race logistical support for this entry has yet to be announced and depends on which teams - if any - sign up with the engine manufacturer over the coming months.