Asda, Tesco, Morrisons, Sainsbury's drivers warned 'don't fill up' at midday or 5pm

Drivers have been warned to only fill up their cars with petrol and diesel at non-peak times. Asda, Morrisons, Tesco, Sainsbury's drivers, as well as motorists who head to BP, Texaco, Shell and Esso to fill up, have been told the cheapest times to buy fuel from the pump.

Gordon Wallis from Your NRG, said: “A common misconception is that filling up your car late in the evening when temperatures are cooler can save money because fuel is denser. While small changes in fuel volume due to temperature can affect fuel efficiency, the difference is usually very small and can only save pennies per fill-up, though it can add up over time for careful drivers.

"It's a good idea to fill up your petrol tank during late evenings or early mornings because fewer people buy fuel, so the prices are lower." Gordon went on to say: “Drivers should try to avoid filling up during midday or after 5 pm when most people are done with work as queues can quickly form."

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He continued: “Filling your car's tank completely does add weight, but it's a small amount – typically less than 5% of the car's total weight, so the difference in fuel efficiency between a full and half-full tank is likely to be minimal and you might not see much change at the forecourt.”

AA fuel price spokesman Luke Bosdet said: "The question is whether, after a significant fall in the UK's average petrol price in June, the price will repeat last year's sharp rise going further into the summer. It would be a blow for the impending summer getaway if the cost of road travel took off again.

"For now, filling up sooner rather later will take advantage of current lower prices. Statutory fuel price transparency coming into force later this year will therefore be a big boost for drivers facing this type of market movement in the future.

"At present, the scheme has revealed some upheaval in old patterns of fuel retailing, such as Asda offering supermarket pump prices at some non-supermarket forecourts where it has a retail presence and the independent chain Motor Fuel Group providing cheap fuel on former Morrison supermarket forecourts."