How to Change Engine Oil | Step-by-Step DIY Guide

Is that engine oil light on your dashboard making your heart race? It is stressful but important. Because an engine is a combination of complex moving parts, it needs to run smoothly. By timely changing engine oil, your car engine will run smoothly for a longer time, and it even helps in fuel economy. It is an important part of car maintenance.

Although the oil can also be changed at home with proper tools, and you don’t need to visit a garage. In this blog, we will walk you through the whole process of how to change engine oil step-by-step. 

So let’s get started!

Key Takeaways: How to Change Engine Oil?

Changing engine oil at home is simple: gather tools, follow safety steps, drain old oil, replace filter, refill with correct grade, check for leaks, dispose responsibly, and record your maintenance

• Regular oil changes protect your engine: Timely oil changes reduce friction, prevent overheating, and extend engine life.

• DIY oil changes are possible with the right tools: Spanners, oil filter wrenches, drain pan, funnel, gloves, and ramps or axle stands are essential.

• Safety first: Always work on a level surface, wear gloves and eye protection, and never rely solely on a jack.

• Follow correct steps: Warm the engine, drain old oil, replace the filter, refill with recommended oil, check for leaks, and dispose of waste responsibly.

• Choose the right oil for your car: Use manufacturer-approved grades and specifications (e.g., 5W-30, ACEA C3) listed in your car handbook.

• Avoid common mistakes: Don’t reuse the sump plug washer, avoid overfilling, and ensure the oil filter is fitted correctly.

• Responsible disposal matters: Used engine oil is hazardous — recycle at local centres or approved garages to stay environmentally compliant.

• Track maintenance: Record the date and mileage of each oil change to maintain service history and support resale value.

Car damaged beyond repair? Sell it as it is

If your car’s already damaged, Exchange My Car can help. Compare instant offers, book free collection, and get paid fast. It’s quick, simple, and all online.

Sell your car!

Which Tools are Needed to Change Engine Oil?

Before you get started, it is important to collect some of the tools to make the job quicker, cleaner and safer. Here’s what you’ll need to change your car’s engine oil at home.

• Spanner
• Oil filter spanner
• Oil drain pan
• Funnel
• Protective gloves
• Jack and jack stands
• Oil – check what oil you’ll need and how much in your car owner’s manual
• Replacement oil filter

Safety Precautions Before You Start Changing Engine Oil

While changing oil at home, it is important to keep yourself safe because it involves working under a vehicle and handling hot liquids. Here is how you can make yourself safe:

• Park your car on a level surface 
• Protect yourself by wearing heat-resistant gloves and safety googles
• Keep a suitable fire extinguisher nearby
• Perfectly place an oil drain pan

How to Change Engine Oil Step-by-Step: 

Changing your engine oil is straightforward if you follow a careful, step-by-step process. We’ve broken it down so you can do it safely and efficiently at home.

Step 1: Warm the engine

Engine oil drains out easily when the engine is slightly warm. Start your car and let it idle for a few minutes, then switch it off and allow it to cool down slightly. This will thin out old oil and allow it to carry out all contaminants with it. 

Step 2: Drain Old Oil

Now it’s time to drain out the old oil. It is important to keep the drain pan in the perfect position so that it drains perfectly without spilling here and there. Then slowly unscrew the plug, and it will start pouring immediately, so be prepared. 

Step 3: Replace Oil Filter

An oil filter’s primary function is to capture contaminants. It’s important to replace filter every time you change the oil filter. Here is how you can replace the oil filter:

• Locate the filter, which is usually near the engine block.
• Unscrew the old filter with a filter spanner
• Check that the old filter’s rubber seal isn’t stuck to the engine. 
• Screw new filter by hand first and then tighten it with a spanner.

Step 4: Refill with Fresh Oil

Now the system is ready for new oil, and make sure you are pouring the correct grade and specification for your car. First locate the cap and remove it. Then insert a clean funnel and slowly pour in the recommended amount of fresh oil. Lastly, refit the cap and start the engine for a while to let oil circulate for a minute.

Step 5: Check for leaks & level

Before everything is done, it is important to check for all leaks and levels. Leaks can be spotted by starting the engine for 60 seconds while keeping an eye underneath for any drop. If there is any, fix it promptly. For a level check, switch off the car engine and let the oil settle down. Then recheck the oil level using the dipstick. 

Step 6: Dispose of waste oil & clean up

Lastly, you are not finished yet until you sustainably dispose of waste oil. Because used engine oil is hazardous, never pour it down drains, onto the ground, or in your household bin. Pour the old oil into a clean, sealed container. Then take it to your local recycling centre or to a local auto parts store.

Choosing the Right Oil & Filter

Before you buy anything, you should read the manual first to know which oil you need to buy for your car. It lists the recommended oil grade (for example, 5W-30 or 0W-20) and whether it should meet ACEA or API specifications. The W illustrates how it flows when cold (W for winter), and the second number (30) tells you how it flows when hot.

When selecting a filter, ensure it is either manufacturer-approved or a high-quality alternative. Always prioritise quality, because a better filler offers better filtration and durability.

Recommended Engine Oil for Popular UK Cars

Common Mistakes to Avoid

Changing engine oil is a simple process, but small mistakes can cost you more. So be keen while changing engine oil and here is how you can avoid mistakes:

• Not replacing the sump plug washer, and always using a new washer for a proper seal.
• Using the wrong oil grade, so check your car’s manual.
• Overtightening the oil filter can strip threads and crack parts. 
• Skipping safety measures 

Frequently Asked Questions

How often should I change my car’s oil in the UK?

The old standard is around 3000 miles, where a car owner should change their car’s engine oil. In modern cars, it’s often between 10,000 and 20,000 miles or once a year, whichever comes first. However, you will find the best answer in your car’s manual, which will give the most accurate interval.

Do I need to change the oil filter every time?

Yes, it’s highly recommended. A new filter is inexpensive insurance for your engine. Putting fresh, clean oil through an old, dirty filter will contaminate the new oil almost immediately. 

How do I dispose of used engine oil in the UK?

The best way to dispose of used engine oil is to pour it in a sealed container. Then take it to the designated oil banks or to a local recycling centre. Also, keep in mind that never pour into solid or drainage. It is iligal and environmentally harmful.

How long does a DIY oil change usually take?

For most UK cars, a full DIY oil change takes 30–60 minutes, including draining, filter replacement, refill, and clean-up. 

Why is an engine oil change necessary?

Engine is the combination of complex moving parts and needs to be lubricated for better movement. It reduces friction and prevents engine overheating. Engine oil also behaves like a cooling agent, which draws heat away from the engine. 

Conclusion: How to Change Engine Oil

Regularly changing engine oil after specific intervals is the best practice to maintain your car. It helps in running your car smoothly and maintaining engine health for a long time. By now you may have got all those important steps on how to change engine oil safely at home. Everyone can do that with proper tools and precautions. 

For car maintenance expert advice, visit our blog section.