Once and always “Iron Man” and possible Best Supporting Actor Oscar nominee Robert Downey Jr. is holding a sweepstakes/fundraiser, offering five of his electric-modified classic cars to lucky winners.

You don’t have to buy or donate anything to win, but donations are accepted and there’s also merch related to this cool, environmentally friendly fundraiser. And if you donate, you can increase your entries and thus slightly improve your odds for winning.

For his “Dream Cars” TV series, he adapted his Mom’s old Merc to be electric, converted a classic “big block” 1965 Corvette into something less likely to change the climate — and did the same for a VW Microbus, a vintage Chevy pickup, a classic Buick Riviera and an ’85 Chevy El Camino.

And now he’s unloading inventory and you could get your hands on one of those electric babies for nothing. All for the benefit of the reduce-your-carbon “Footprint Coalition.”

What have you got to lose? Aside from all the time it takes to figure out how to enter without donating (buried info, digtally tricky, etc.). Want that Oscar, RDJ? Maybe make “Entering” a tad easier before there’s a scandal.