But Massa says that keeping the car is part of his new deal with the Grove-based outfit.
"It’s mine, it’s mine," said Massa.
"I saw the car in the factory two days ago, it’s got my name on the side.
“What happened in the last two races – especially in Brazil – I had an amazing feeling. It was the perfect stopping feeling.
"And then everything changed, and my heart was pushing me to carry on. I followed that."
Initially, Massa decided to call it a day as a result of reasonable thinking rather than weariness and fatigue. But upon his return, he is raring to go.
“It was a little surprise when Claire [Williams] called me to ask if I’d stop my retirement, but definitely I’m ready and motivated.
"For sure, I was not retiring from racing, and I was looking at a different category, but then everything changed – and I still feel not so old, and ready to come back again.”