"We don't want to take any shine off what Scotty and car #17 did.
"We went hard all year. I hate just plucking things off in the last round.
"To win the championship, it's the best over the whole year, so let's forget about all of the ins and outs, those guys are well and truly deserving winners and we couldn't be any more congratulatory to them."
Whincup took five wins, 16 podiums and five poles on his way to third in the championship, 511 points behind the man he defeated in Newcastle in 2017.
He reverts to #88 next year, when Ford introduces its new Mustang Supercar against Holden's new-for-2018 ZB Commodore.
Asked if he was coming back with more drive to win another title in 2019, Whincup said: "100 percent.
"The day I don't think I can win or be competitive is the day I'll give it away.
"I'm really looking forward to the break, it's been a long old grind."