Disclaimer

Last updated 21 October 2026

CarO and this website provide general information about car maintenance, running costs and mileage records. It is not professional mechanical, financial, legal or tax advice.

• Your owner's manual comes first. Maintenance intervals, fluids and specifications vary by make, model, engine and driving conditions.
• Safety. If a red warning light comes on or your car behaves unusually, stop when it's safe and get qualified help. See dashboard warning lights.
• Estimates. Calculators give estimates based on the numbers you enter and published averages, such as AAA's driving cost study. Real costs vary.
• Tax. Mileage rates and rules change; we show the date we checked them. Check IRS, HMRC or your local authority, or a tax professional, before relying on any figure.
• Third-party apps. Comparisons reflect store listings on the date shown and may change.

Read how we research and update content in the editorial policy. Questions? Contact us.