Cheapest Times to Refuel Your Car — Expert Busts Popular Fuel Myths

A fuel specialist has revealed the best times to fill up and tackled common misconceptions about fuel efficiency and tank levels.

Late-Night Refuelling Myth Busted

Contrary to belief, filling up at night when fuel is “denser” barely saves money—just pennies per tank, says expert Gordon Wallis.

Best Times to Fill Up for Savings

Fuel is typically cheaper late in the evening or early morning, when demand is low. Prices often rise around midday and after 5pm.

Queues and Costs Peak After Work

Avoid the rush—fuel prices and station queues tend to spike after work hours, making evening refuels less economical.

Full Tank Adds Weight—But Barely

A full tank adds weight, but it’s under 5% of the car’s mass. The impact on fuel efficiency is negligible in real-world terms.

Half Tank vs. Full Tank Efficiency

There’s little difference in efficiency between half and full tanks. Most drivers won’t notice any real savings by driving lighter.

Avoid Hitting Empty

Drivers should refuel when the gauge shows 50 miles left. This gives time to find better prices and avoid emergency top-ups.

Running on Empty Can Be Costly

Letting your tank run dry risks damaging the fuel pump—a repair that can cost far more than a timely refuel.

Quarter-Tank Rule Is Smart

Maintaining at least a quarter tank is a smart habit. It protects your vehicle and helps you manage fuel costs more efficiently.