Car Selling

Fuel costs are driving inflation up. Is it time to swap to a cheaper-to-run car?

By swoppa Team
Published on
2 min read
Fuel costs are driving inflation up. Is it time to swap to a cheaper-to-run car?

If filling up has felt more painful lately, the official figures back you up. UK inflation rose to 3.5% in September, up from 3.1% in August and the highest rate since October 2025, according to the Office for National Statistics.

The biggest single push came from transport, and motor fuels in particular. Transport prices were 6.6% higher than a year earlier, and average diesel prices hit their highest level since July 2022.

That matters for anyone whose car does a lot of miles on petrol or diesel. When fuel is the thing driving prices up, the car you drive is one of the few levers you can actually pull. So is now the time to swap to something cheaper to run?

What fuel is costing you right now

Pump prices peaked again in September, with diesel averaging around 199p a litre and petrol around 174p, according to the RAC.

To put that in real money: a petrol car averaging 45mpg over 10,000 miles a year burns roughly 1,010 litres, about £1,760 at today's prices. A diesel doing 55mpg over the same distance costs around £1,640. Every 10p rise per litre adds roughly £80 to £100 a year on top. (Illustrative figures; swap in your own mileage and mpg.)

It's not just fuel either. With inflation above target, the Bank of England is widely expected to raise interest rates at its next meeting on 5 November, which can push up the cost of car finance. [BUDGET DETAIL, if publishing after 28 October: add whether fuel duty is set to rise in January.]

Your cheaper-to-run options

You're not the only one rethinking. Over half of buyers told Carwow that rising fuel prices had made them more likely to consider a hybrid or electric car, and EVs made up a record 40% of new car configurations on its site in September.

Smaller or newer petrolHybrid
Best forLow mileage, mostly short local tripsMixed driving, no home charger
Fuel exposureFull exposure to pump pricesReduced, especially in town
Watch out forStill tied to fuel price swingsSavings shrink on long motorway runs

Public charging costs more than home; pay-per-mile tax planned from April 2028

The right answer depends on how far you drive, where you can charge and how long you'll keep the car. For a full side-by-side, read our guide to petrol, hybrid or electric [internal link].

Signs it's time to swap

  • Fuel has become one of your biggest monthly outgoings.
  • Your mileage has gone up with a new job, a longer commute or more family runs.
  • You've got a driveway or workplace charging but you're still on petrol or diesel.
  • Your car is bigger than you need now the kids have moved out, or smaller than you need now they've arrived.

Swap, don't sell

Switching to a cheaper-to-run car shouldn't mean a long, risky commitment, especially when fuel prices and interest rates are moving this fast.

swoppa shows you where you stand with your car and your car finance, so you know whether now is the right time to change. It puts your car’s value, what you still owe and your credit position into one simple number: your swoppa score.

How it works

  • Value your car. Enter your reg to get a free car valuation.
  • Add your finance details. swoppa compares your car’s value with your remaining balance. That tells you whether you’re in positive equity, negative equity or around break-even.
  • Get your swoppa score. swoppa runs a soft search with TransUnion, which won’t affect your credit score, and turns everything into one timing signal.
  • Make your move when it suits you. Keep tracking your position over time, or act once the numbers work in your favour.

What you can do with swoppa

  • Free Car Valuation: find out what your car is really worth.
  • Credit Score: see your credit position and how it shapes your options for your next car.
  • Car Finance: explore finance options and apply when you’re ready.
  • Sell My Car: check your position, get an offer and have your car collected.
  • Car Search: search for your next car with your current position in mind.

swoppa is free to use. It earns a commission from finance providers and dealers only if you choose to swop through them.

Check my car’s position →

Sources

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Frequently Asked Questions

Inflation rose to 3.5% in September mainly because of higher fuel prices. Transport, particularly motor fuels, made the largest upward contribution, according to the ONS.

For most drivers who can charge at home, an electric car has the lowest day-to-day running costs. Hybrids suit mixed driving without a charger, and a small petrol car can still make sense for very low mileage.

Nobody can say for sure. Diesel in September was at its highest since July 2022. Choosing a car that's less exposed to pump prices is one way to take some of the uncertainty out of your budget.

Know your next move, every time.

Track what your car’s worth, what you owe, and when it’s the right time to change - all in one simple score.

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