Roger Gray is missing from his home in Loxley Close, York.
Police are appealing for anyone who thinks they might have seen him to get in touch.
A force spokesman said: "Officers are concerned for the welfare of Roger and are appealing for anyone who thinks they might have seen him to get in touch.
"It is believed Roger is wearing a blue quilted coat, and grey trousers.
"He left home in his car, a green Vauxhall Astra, registration number MJ17 UWU.
"Anyone with any information about the whereabouts of Roger, or his car, is asked to contact police. Dial 101, press 1 and pass information to the force control room."