A warning has been issued for millions of drivers who have had a car made after 1995. Petrol and diesel motorists with cars 'built in last 30 years' can save money by driving with 'zero fuel', one motoring expert has claimed. Gordon Wallis from Your NRG says the technology, Deceleration Fuel Cut-Off or DFCO, functions by stopping fuel injection when drivers coast with their vehicle engaged in gear. It means the car's wheels drive the engine rather than fuel combustion powering the movement. The tech has been incorporated into virtually all petrol and diesel vehicles manufactured from the mid-1990s onwards. READ MORE Warning for anyone who still has UK landline in 137 parts of England Mr Wallis said: "When you lift your foot off the accelerator but keep the car in gear, the engine is driven by the wheels, not fuel. "That means your car can effectively use zero fuel while slowing down. It's a clever bit of engineering that most drivers are benefiting from without even realising it." Mr Wallis said: "It's one of the simplest habits to adopt. Ease off the throttle early and allow the car to naturally slow itself down while in gear. You stay in control, reduce brake wear, and burn no fuel while doing it. "As long as your car was built in the last 25 to 30 years, it's highly likely to have DFCO built in. You just need to adjust your driving style slightly to take advantage of it." Wallis said the method was handy amid the ongoing Cost of Living crisis, as Tesco , Sainsbury's , Morrisons and Asda motorists continue to be hit by sky high bills at forecourts. He went on and said: "In a time where fuel costs are unpredictable and every pound counts, using your vehicle's existing technology to save money just makes sense. "It's better for your budget, better for your car, and better for the environment."