How do I reduce the cost of running a car?
Where car costs actually go, and which changes make a real difference against which are marginal.
- Difficulty
- beginner
- Time
- 1 hr
- Read
- 2 min
Short answer
Insurance, fuel and depreciation are the big three. Shop insurance at every renewal, keep tyres correctly inflated, drive more smoothly, and service the car on schedule — deferred maintenance is consistently more expensive than doing it.
Car costs are dominated by a few large items, and effort spent on the small ones rarely pays. Insurance and fuel are the two most controllable; depreciation is decided mainly by what you buy rather than how you run it.
What you'll need
- Insurance renewal documents
- Tyre pressure gauge (optional)
- Service history (optional)
Step by step
- Shop insurance at every single renewal.Compare a month before, then go back to your existing insurer with the best quote. It is usually the largest single saving available in one phone call.
- Check tyre pressures monthly.Under-inflated tyres increase fuel consumption noticeably and wear out faster. It costs nothing and takes five minutes.
- Drive more smoothly.Gentle acceleration, anticipating rather than braking hard, and staying off the higher speeds. Fuel consumption rises sharply above about 100km/h.
- Remove unnecessary weight and roof accessories.A roof box or bars left on all year costs a meaningful amount in fuel through aerodynamic drag alone.
- Service it on schedule.Deferred servicing is a false economy. Oil changes and cambelt intervals in particular prevent failures that cost many times the service.
- Learn a few basic checks.Oil, coolant, screenwash, tyres, lights. Catching problems early is where most of the money is saved.
- Get quotes from independent garages, not only dealers.Independent garages are frequently much cheaper for the same work, and using one does not usually affect a warranty if servicing is to schedule.
- Consider whether you need the car at all for some journeys.Short journeys are the most expensive per mile and hardest on the engine. Combining trips saves more than most driving techniques.
Tips
- Depreciation is usually the single largest cost of a newer car and it is invisible because it is not a bill. Buying a car a few years old avoids the steepest part of it.
- Keep the service history complete and documented. It materially affects resale value, often by more than the servicing cost.
- Paying insurance annually rather than monthly avoids what is effectively a credit charge, often at a high rate.
Common mistakes
- Letting insurance auto-renew — Renewal quotes are routinely well above what the same insurer offers new customers. It is the biggest and easiest saving available.
- Deferring servicing to save money — Missed oil changes and cambelt intervals cause failures that cost many times more than the service would have.
- Ignoring tyre pressures — Under-inflation increases fuel use and wears tyres out early, and checking takes five minutes a month.
Questions people ask
What is the biggest cost of running a car?
Usually depreciation on a newer car, then insurance and fuel. Depreciation is invisible because it is not a bill, which is why it is so often left out of the calculation.
Does driving style really affect fuel consumption?
Substantially. Smooth acceleration, anticipating traffic instead of braking hard, and moderate speeds all make a measurable difference — often more than any single mechanical change.