"I can see where the appeal would be with Marcos, because he knows those guys," Whincup told AAP.
"He's certainly got a lot of V8 Supercar experience and he's an extremely good driver.
"It's interesting. It's only rumours at the moment but it's an interesting concept.
"It'd be great to drive along one of the best V8 Supercar drivers we've seen."
Cindric says any formal planning to try and get a V8 entry together wouldn't happen until after this year's Indy 500 in May, an event Team Penske has won 15 times.
Whincup says, whether the American giant does get involved or not, the fact it's even contemplating an entry is a huge plus for the V8 championship.
"Hopefully it'll lead to a lot more international events, which is what we want to do," he said.
"We do want to expand that side of it, maybe with Penske involved it'll make that transition easier."
-AAP