When to Service Your Car and Change the Oil: A Complete Guide

Regular maintenance is the key to keeping your car reliable and making it last. But many drivers aren’t sure when to service their car or change the oil. This guide breaks down the timeframes, the warning signs and the tips that matter.

Why regular servicing and oil changes matter

• Prevent engine damage: fresh oil keeps engine components lubricated and reduces wear.
• Better fuel economy: a well-maintained engine uses fuel more efficiently.
• Longer vehicle life: regular checks catch small issues before they become expensive repairs.
• Safety: servicing makes sure brakes, tyres and other critical parts are working properly.

How often should you service your car?

It depends on your car’s make, model and how you drive. As a general guide:

1. Interim service

Roughly every 6 months or 6,000 miles, whichever comes first — especially if you do a lot of city driving, short trips or heavy traffic.

2. Full service

Once a year, a more thorough service that checks brakes, suspension, coolant and more, and replaces the air and cabin filters.

3. Manufacturer’s schedule

Always check your handbook or service book for the intervals your manufacturer recommends. Following them keeps your service history — and your car’s value — intact.

When to change your oil

1. By mileage

Intervals depend on the oil your car uses:

• Conventional oil: typically every 3,000–5,000 miles.
• Synthetic oil: typically every 7,500–10,000 miles. Synthetic oil lasts longer and protects better.

2. By how you drive

Frequent short trips, stop-start traffic or towing wear oil out faster, so change it sooner.

3. By time

Even if you don’t drive much, change the oil at least every 6–12 months. Oil degrades over time.

Signs your car needs an oil change

• Dark or gritty oil on the dipstick.
• Engine noise or knocking — old oil can’t lubricate properly.
• Oil warning light on the dashboard — act immediately.
• Excessive exhaust smoke can indicate a more serious oil problem.

Tips for easier maintenance

• Keep to a schedule: set a reminder for your next service date.
• Use the right oil: always the grade your manufacturer recommends.
• Choose a trusted mechanic: someone who explains what they find.
• Keep records: a full service history makes your car easier to sell.

The bottom line

Servicing your car and changing the oil at the right intervals is the cheapest way to avoid big repair bills. We do interim and full services and oil and filter changes at your home or workplace across West London, Surrey and Berkshire — book online or give us a call.