You pull into a rental car lot in a city you don't recognize, toss your bag in the trunk, and head straight to the nearest gas station because the tank is almost empty. At the pump, you discover the fuel door is on the other side of the car. This happens to drivers constantly, and most never realize their own dashboard already had the answer before they even left the lot.
Next to the small gas pump symbol on your fuel gauge is an arrow. It points left or right. It is not there by mistake. According to Automotive News' obituary for him, this detail traces back to Ford designer James Moylan, who died Dec. 11, 2025, in Naples, Florida, at age 80, the Ford Motor designer credited with inventing the fuel gauge arrow that shows drivers which side of the vehicle to refuel. The obituary explains how his short internal memo became one of the most helpful yet rarely mentioned features in modern cars.
A rainy afternoon and a problem nobody had bothered to fix
Moylan worked as a designer in Ford's plastics and paint division. He was not an engineer trying to find an invention, he was just frustrated. Per Ford Authority's account of his career, he joined Ford as a draftsman in body engineering in 1968 before moving into plastics engineering, and the idea for the arrow came on a rainy day in 1986, when he pulled a company car into a gas station to refuel it, only to discover he had parked on the wrong side of the pump. Soaked, he went back to his office and wrote a proposal to his boss.
In that April 1986 memo, reported by both Automotive News and Ford Authority, Moylan wrote that the indicator he had in mind would sit near the fuel gauge and simply tell the driver which side of the vehicle the fuel door was on. Ford said yes: according to Ford-Trucks.com's review of the internal correspondence, interior design director R.F. Zokas replied in November 1986 confirming the idea was headed for production, and the "Moylan Arrow" made its official debut on the 1989 Ford Escort and Mercury Tracer, followed by the Thunderbird and Cougar. From there, per The Drive's reporting, the idea spread industry-wide, though Ford wasn't strictly first, Mercedes-Benz had already used a low-fuel arrow-shaped light in some models; Ford and Moylan get credit for pushing it into mass-market use. The symbol cost almost nothing to add, which is largely why it caught on so widely.
For most of its history, the arrow's inventor was anonymous. The Drive notes that the public only learned Moylan's name a few years ago, after a podcast surfaced the story; Ford's archivists later dug up and digitized his original memo, and CEO Jim Farley shared it publicly in 2022, nearly four decades after it was written.
Why the arrow matters more when the car is not yours
Drivers who own a vehicle for years rarely think about which side to pull up on. The arrow earns its keep the moment a driver is behind the wheel of something unfamiliar. That situation is common for a share of young American drivers today, not just occasional travelers.
