Last month Autoweek reported that Lamborghini was in play for a 3rd engine manufacturer and pulled out. No fear, there were rumblings that Chinese company Geely might use Volvo in Indycar, well the word on the street (insider to Hulman companies) broke the news 2 days ago that he just got word Volvo backed out too. Meanwhile Formula E has Citroen, Renault, Audi, and Jaguar and yet nobody cares. I think if Indycar is to draw another manufacturer they'll have to find a way to go a more radical engine formula while at the same time making it as cheap as possible to keep the owners afloat. Manufacturers and sponsors at this point seem to be ok with being a part of racing that doesn't get ratings as long as they seem to be environmentally friendly to the 2% of people that buy hybrid cars.