How Often Should You Change Your Engine Oil?
Written by Petro Olekhnovych, mobile mechanic in Aylesham, Kent
How often you should change engine oil depends on your car, so the handbook or service book is the final word. As a guide, the AA says cars on a fixed schedule usually need an oil change every 9,000 miles or 12 months, whichever comes first. Cars on a variable schedule tell you when a service is due, often at longer gaps.
Fixed or variable: which schedule is your car on?
Most modern cars follow one of two approaches.
Fixed servicing. The oil is changed at a set mileage or time. The AA gives 9,000 miles or 12 months as typical. Volkswagen, for example, says most of its cars on fixed servicing are due at 9,300 miles or 12 months.
Variable (flexible) servicing. The car monitors how it is used and tells you when it needs a service. The AA notes these cars typically use longer-life oil. Volkswagen says on flexible servicing “your Volkswagen’s service light will tell you when you need to book your car in”. Ford’s Intelligent Oil-Life Monitor shows an “Oil change required” message, and Ford says the oil must then be changed within 1,000 miles or 1 month, whichever comes first.
Not sure which one your car uses? Check the service book or handbook. Intervals differ between makes, models and engines.
Why the time limit matters, even on low mileage
The “whichever comes first” part catches a lot of people out. If you only do a few thousand miles a year, the 12-month limit will usually arrive before the mileage limit.
Low mileage is not always gentle on an engine. Volkswagen recommends fixed servicing for drivers doing under 9,300 miles a year, mainly in town or on frequent short journeys. Many retired drivers and second-car owners around Aylesham and the villages fit that pattern.
Need a service or brakes doing?
Servicing, pads, discs and fluids done on your driveway across East Kent.
WhatsApp for a free quote Call 07563 350335
Labour £30 to £50 per hour depending on the job. Send your reg number and we will reply with a price before any work starts.
What shortens the oil change interval
Ford lists several driving conditions that mean the oil needs changing more often:
- Slow, frequent driving in town centres, under 30mph
- Regular short trips of under 2 miles
- High engine load, such as a full load, towing a trailer or frequent hill climbs
The RAC adds that older, higher-mileage cars may need more frequent changes. If your driving matches these, ask about a shorter interval rather than stretching to the maximum.
Signs your oil needs attention
Do not wait for the next service if you notice any of these. The RAC lists:
- Dark, dirty or gritty oil on the dipstick. Fresh oil is amber or light brown.
- Grinding or squealing noises, which can mean parts are not being lubricated properly. The RAC warns ticking or knocking can mean serious damage.
- A sudden drop in fuel economy.
- Thick grey exhaust smoke with a burning smell, which the RAC says is a sign of oil burning.
Safety first: if the oil warning light comes on while you are driving, the RAC advises pulling over safely and turning the engine off. If the light stays on after topping up, do not drive the car. Low oil can quickly cause serious engine damage. Our guide to the oil pressure warning light explains more.
How to check your oil between changes
An oil change only replaces the oil. It is still worth checking the level yourself. The RAC suggests once a month, or weekly if you do high mileage or lots of town driving, and always before a long journey.
- Park on level ground with the engine off and cool. The AA says wait 5 to 10 minutes after driving.
- Pull out the dipstick, wipe it clean, push it fully back in, then pull it out again.
- The level should sit between the minimum and maximum marks.
- If it is low, add a little of the correct oil at a time and recheck.
The AA says the gap between the marks is about one litre and warns that too much oil is just as bad as too little. Some modern cars have no dipstick and show the level on the dashboard instead, so check your handbook.
Using the right grade matters too. Our guide on which engine oil your car needs covers that.
What affects the cost of an oil change
We do not quote fixed prices without knowing the car, because the cost depends on:
- How much oil your engine takes
- The grade and specification the manufacturer requires
- The oil filter for your model
- How easy the filter and drain plug are to reach
The RAC says the oil filter should be replaced at the same time as the oil.
How we can help
We are a mobile mechanic based in Aylesham. We do engine oil and oil filter changes, plus interim and full servicing, at your home or workplace. We cover Aylesham, Canterbury, Dover, Deal, Sandwich, Folkestone and the villages in between. See all areas we cover.
Labour is £30-£50 per hour depending on the job. Parts are extra. We agree the price with you on WhatsApp before any work starts. If your car is due more than an oil change, our car service checklist shows what a full service covers.
Frequently asked questions
Is it OK to go over my oil change interval?
It is best not to. Ford warns that ignoring its oil change message can lead to premature engine wear, damage or failure. Book it in as soon as you can.
Do I need an oil change if I hardly drive?
Yes, in most cases. Fixed schedules have a time limit as well as a mileage limit, usually 12 months.
Should the oil filter be changed every time?
The RAC advises replacing the filter at the same time as the oil.
I bought a used car with no service history. What should I do?
The AA suggests getting an oil and filter change if the history is unclear.
Need help? Send a WhatsApp to 07563 350335 with your car’s make and model and we’ll come to you.
Need a service or brakes doing?
Message us on WhatsApp with your reg and postcode for a price before any work starts.
WhatsApp for a free quote Call 07563 350335
Labour £30 to £50 per hour depending on the job. Send your reg number and we will reply with a price before any work starts.
