The clocks are about to go forward, the mornings are getting lighter, and your car is quietly thanking you. Spring is when fuel economy naturally improves — warmer engines, better tyre grip, and less need for heating all work in your favour. But only if you help it along. A few minutes of post-winter maintenance can recover the efficiency your car lost over the cold months and set you up for cheaper driving all the way through summer.
Why Spring Is Your Car's Best Season
During winter, cold engines, thicker oil, denser air, and constant heater use can slash your fuel economy by 10–20%. As temperatures climb back above 10°C, most of that penalty disappears on its own. But your car has also been through months of salt, grit, and short cold-start trips — and it needs a reset to perform at its best.
Your Post-Winter Car Checklist
1. Re-check Your Tyre Pressures
Tyre pressure drops by roughly 1 PSI for every 6°C fall in temperature. If you last checked in autumn, your tyres could be 3–4 PSI low. Under-inflated tyres increase rolling resistance and can cost you 1–3% in fuel economy. Now that temperatures are rising again, re-inflate to the manufacturer's recommended pressure (on the sticker inside the driver's door or fuel filler cap). It takes two minutes at any petrol station air machine.
2. Clean Off the Winter Grime
Months of salt spray, road grit, and mud add weight and increase surface drag. A thorough wash — including the undercarriage and wheel arches — removes corrosive salt that damages bodywork and brakes. A clean car has slightly less aerodynamic drag than a filthy one, and more importantly, you'll spot any winter damage like stone chips or cracked trim before it gets worse.
3. Clear Out the Boot
Winter encourages hoarding — blankets, de-icer, scrapers, heavy coats, bags of grit. Every 50kg of unnecessary weight costs roughly 1–2% in extra fuel. Remove anything you won't need for the next six months. While you're at it, take off roof boxes and bike racks — a roof box at motorway speed can add up to 20% to fuel consumption through aerodynamic drag.
4. Check Your Wiper Blades and Washer Fluid
Winter is brutal on wiper blades — ice, grit, and salt leave them cracked and streaky. Spring brings more low sun and insect splatter, so clear vision matters more than ever. Replace worn blades (under £15 for most cars) and top up your washer fluid. Poor visibility means slower, less confident driving — which wastes fuel.
5. Check All Your Lights
With shorter dark periods in spring you might not notice a blown bulb until you get pulled over. Walk around the car with the lights on — headlights, tail lights, brake lights, indicators, fog lights. A blown bulb won't affect fuel economy, but the £100 fixed penalty notice will definitely affect your wallet.
6. Book Your Service If It's Due
Spring is a good time to get a service done before the summer driving season. Fresh engine oil flows better than oil that's been through a full winter of cold starts. A clogged air filter alone can reduce fuel economy by up to 10%. Most garages are less busy in spring than in the pre-holiday summer rush.
Spring Driving Habits That Save Fuel
Your car's improving naturally as the weather warms, but your driving habits matter just as much. These changes cost nothing and can make a noticeable difference to your fuel bill.
- Ease off the heating — Many drivers leave their climate control on the same winter setting well into April. Running the heater at full blast when it's 14°C outside wastes fuel. Switch to fresh air or a lower fan setting. Heated seats and heated screens draw power from the alternator, which loads the engine.
- Open windows at low speed, AC at high speed — Below 40mph, opening windows is more efficient than air conditioning. Above 40mph, the aerodynamic drag from open windows costs more than the AC compressor. In spring, you can often avoid both entirely.
- Drive smoothly and anticipate — Spring traffic is lighter than winter (no school-run crawls in the dark, fewer accidents). Use the better conditions to maintain steady speeds, brake less, and accelerate gently. Aggressive driving can cut fuel economy by 15–30%.
- Use cruise control on longer runs — With lighter, drier roads, spring is perfect for motorway cruise control. Maintaining a constant speed rather than fluctuating between 65 and 80mph can save 5–10% on fuel.
- Plan your routes — Longer daylight hours mean more flexibility in when you travel. Avoid rush hour where possible — stop-start traffic can double your fuel consumption compared to a flowing journey. Use Fuelwise to find the cheapest fuel along your route.
- Walk or cycle short trips — Short trips under 2 miles are the least fuel-efficient because the engine never fully warms up. With warmer, drier weather, spring is the perfect time to leave the car on the drive for the school run, corner shop, or post office.
Watch Out for Hay Fever
Spring pollen can be a genuine driving hazard. A sneeze closes your eyes for up to 3 seconds — at 60mph that's 80 metres of blind driving. If you suffer from hay fever, keep windows closed and use recirculated air. Many modern cars have pollen filters in the cabin air system — check yours is clean or replace it. Antihistamines can cause drowsiness, so check you're taking a non-drowsy formula before getting behind the wheel.
The Spring MOT Rush
March, April, and May are the busiest months for MOT tests in the UK because many new car registrations happen in March (the "26 plate" in 2026). If your MOT is due in spring, book early. A failed MOT often means unexpected repair costs, and garages charge more when they're overbooked.
Before your MOT, do a quick self-check: tyres above the 1.6mm legal minimum (ideally above 3mm), all lights working, windscreen chips not in the driver's line of sight, and no warning lights on the dashboard. Fixing these yourself beforehand avoids retest fees and delays.
The Clocks Change on 29 March
British Summer Time begins at 1am on Sunday 29 March 2026. Clocks go forward one hour. That means lighter evenings but darker mornings for a few weeks — adjust your driving accordingly and make sure your headlights are working properly. The extra evening daylight also means less time driving with headlights on, which marginally reduces electrical load on the engine.
How Much Can You Actually Save?
The average UK driver covers 7,400 miles a year. At current petrol prices around 131p per litre and a typical 40mpg car, that's roughly £2,150 in annual fuel costs. The natural efficiency improvement from warmer weather recovers about £75–100 compared to winter. Add in the maintenance reset (tyres, weight, drag) and better driving habits, and you could realistically save £120 or more over the spring and summer months.
Combined with general fuel-saving strategies and shopping around for the cheapest prices in your area, spring is the season where small changes compound into real savings.
Spring Reset Checklist
Re-inflate tyres to correct pressure. Wash the car (including undercarriage). Empty the boot. Remove roof boxes and racks. Replace worn wiper blades. Check all lights. Turn down the heating. Book a service if due. Six simple actions that take under an hour and can save you £120+ through to autumn.