Habul runs a program with Vautier in the GT ranks of the IMSA SportsCar Championship in the US, which includes four long-distance races headlined by the Daytona 24 Hour.
Asked if the successful 12 Hour opened the door to doing something in the US with Habul, Whincup said: “I’m absolutely tapped with the Supercars thing.
“We’ve got another [Supercars] race meeting this year, new aero kit [with the ZB Commodore].
“To be honest, I put in as much as I can but I’m absolutely tapped with motorsport, which includes this race.
“It might sound easy to disappear. I reckon if I sat on the beach in between race meetings I could probably justify going to the US and doing more racing, but my life’s bloody hectic outside of it it as it is.
“I won’t overdo my stay in Supercars. I’d love to do this race again next year, but give it a few years - I’m not going to put a number on it - I’ll hang up my Supercars helmet and I can see myself doing a bit more GT racing and certainly the enduros.”
Post-race, the US-based Australian Habul outlined his desire to return to the 12 Hour in 2019 with his podium-finishing line-up.
The entry attracted factory Mercedes AMG backing for the weekend, including the addition of ex-Ferrari Formula 1 junior Marciello that pushed the car into the Pro class.
“I’d love to come back, absolutely,” Whincup said.
“I said to the Ferrari guys I’d love to come back, but they couldn’t produce a car.
“I’m all about loyalty - I’ve been at Triple Eight for 150 years now - if Kenny wants to do it again, for sure I’ll do it again.”