10 Fuel-Saving Tips That Actually Work for UK Drivers

With petrol at around 145p per litre and diesel at 153p, the average UK driver spends £1,000–£1,500 per year on fuel. The good news: you can realistically cut 15–25% off that bill without changing your car. These 10 tips are backed by data from the RAC, AA, and Energy Saving Trust — and they genuinely work.

1. Keep Your Tyres at the Correct Pressure

Estimated saving: 3–5% of fuel costs (£30–£75/year)

Under-inflated tyres increase rolling resistance, which means your engine works harder and burns more fuel. Tyres that are 10 psi below the recommended pressure can increase consumption by up to 5%. Check your tyre pressure at least once a month and before any long journey. The correct pressures are listed on a sticker inside the driver’s door frame or in the owner’s handbook.

2. Accelerate Smoothly and Progressively

Estimated saving: 10–15% of fuel costs (£100–£225/year)

Aggressive acceleration is the single biggest fuel waster. The Energy Saving Trust recommends changing up before 2,500 rpm (petrol) or 2,000 rpm (diesel). Gentle acceleration to your target speed uses significantly less fuel than flooring it from every traffic light. Think of it as pressing the accelerator with an egg under your foot.

3. Anticipate Traffic and Avoid Harsh Braking

Estimated saving: 5–10% of fuel costs (£50–£150/year)

Every time you brake, you’re converting fuel energy into waste heat. By looking further ahead and lifting off the accelerator early when approaching traffic, roundabouts, or red lights, you maintain momentum and avoid the stop-start cycle that guzzles fuel. Keep a safe following distance so you can slow down gradually instead of braking hard.

4. Remove Roof Boxes and Roof Bars When Not in Use

Estimated saving: 5–10% at motorway speeds (£30–£80/year)

An empty roof box adds significant aerodynamic drag, especially at motorway speeds. The RAC estimates that an empty roof box can increase fuel consumption by up to 10% at 75 mph. Roof bars alone add 2–4%. If you’re not using them, take them off. It takes 10 minutes and could save you £50+ per year if you do regular motorway driving.

5. Use Cruise Control on Motorways

Estimated saving: 2–5% on motorway journeys (£20–£50/year)

Cruise control maintains a steady speed, which is more fuel-efficient than the natural tendency to speed up and slow down. It’s most effective on flat motorways. On hilly roads, it can actually use more fuel because it accelerates to maintain speed on inclines — in those situations, it’s better to let the car slow slightly on uphills and regain speed on downhills.

6. Don’t Idle Unnecessarily

Estimated saving: 1–3% of fuel costs (£10–£45/year)

Idling for more than 30 seconds uses more fuel than turning the engine off and restarting. Many modern cars have automatic stop-start systems for this reason. If you’re waiting at a level crossing, stuck in standstill traffic, or waiting to pick someone up, turn the engine off. Note: it’s an offence under the Road Traffic (Vehicle Emissions) (Fixed Penalty) (England) Regulations 2002 to idle your engine unnecessarily on a public road.

7. Air Con vs Windows: It Depends on Speed

Estimated saving: 2–5% of fuel costs (£20–£75/year)

Air conditioning increases fuel consumption by 5–10%. Open windows create aerodynamic drag. The crossover point is around 50–60 mph. Below 50 mph: open the windows and switch off the air con. Above 50 mph: close the windows and use air con. In mild weather, use the ventilation system without the air conditioning compressor — that’s free.

8. Plan Routes to Avoid Congestion

Estimated saving: 5–10% of fuel costs (£50–£150/year)

Stop-start driving in heavy traffic can double your fuel consumption compared to a free-flowing journey. Use Google Maps or Waze to check for congestion before you leave, and consider travelling at off-peak times. Even a slightly longer route with flowing traffic can use less fuel than a shorter route through gridlock.

9. Use Supermarket Fuel

Estimated saving: 3–5% of fuel costs (£30–£75/year)

Supermarket fuel (Tesco, Sainsbury’s, Asda, Morrisons) meets exactly the same British Standard (EN 228 for petrol, EN 590 for diesel) as branded fuel from BP, Shell, or Esso. The difference is typically 3–6p per litre cheaper. On a 50-litre fill-up, that’s £1.50–£3.00 saved each time. Over a year of regular fill-ups, it adds up.

Use apps like PetrolPrices or Waze to find the cheapest fuel near you. Prices can vary by 10p+ per litre within a few miles.

10. Consider a Fuel Card If You Drive High Mileage

Estimated saving: 2–4p per litre (£60–£200/year for high-mileage drivers)

If you drive 15,000+ miles per year (especially for work), a fuel card can offer consistent discounts of 2–4p per litre across a network of stations. Options include the Shell Fuel Card, BP Plus, and Allstar. Some employers offer fuel cards as part of a salary sacrifice scheme. The savings are modest per fill-up but significant over high annual mileage.

Potential Savings Summary

*Based on annual fuel spend of £1,000–£1,500. Savings overlap, so individual percentages don’t stack additively.

Final Thoughts

None of these tips require buying a new car, expensive gadgets, or major lifestyle changes. The biggest savings come from how you drive — smooth acceleration, anticipating traffic, and maintaining tyre pressure alone can save £150–£300 per year. Add in supermarket fuel and sensible air con use, and you’re looking at genuine annual savings of £200–£400.

Savings estimates based on data from the RAC, AA, and Energy Saving Trust. Individual results vary based on driving conditions and vehicle type.

Related reading: Cheapest Cars to Run in the UK | Petrol vs Diesel in 2026