Oils and Fluids

Keep Your Vehicle Topped Up and Road Ready

Vehicle fluids do a lot of important work. Engine oil helps lubricate moving parts, coolant helps manage engine temperature, screenwash keeps your windscreen clear, and brake fluid, steering fluid and transmission fluids all support key vehicle systems.

For UK drivers, regular checks are especially useful before long journeys, winter driving, motorway trips, towing, camping holidays or touring in a campervan. A quick top-up at the right time can help avoid unnecessary stress when you’re already packed and ready to go.

Having the correct oils and fluids at home, in the garage or in your vehicle kit also means you’re not relying on finding the right product at the last minute.

How to Choose the Right Oils and Fluids

Start with your vehicle handbook or manufacturer guidance. The correct product depends on your vehicle make, model, engine type, age and system requirements.

Key decision factors include vehicle compatibility, fluid type, viscosity, manufacturer specification, capacity, seasonal use, ready-mixed or concentrate format, pack size, storage needs and whether the product is suitable for topping up or a full change.

Do not choose oil or fluid by guesswork. Two products can look similar but have different specifications. This is especially important for engine oil, brake fluid, coolant, transmission fluid and power steering fluid, where the wrong product may affect performance or cause damage.

Engine Oil, Coolant and Screenwash

Engine oil is one of the most commonly checked vehicle fluids. When choosing engine oil, compare the viscosity grade and specification required for your vehicle. A modern petrol engine, diesel engine, older car or high-mileage vehicle may need a different oil, so always check before topping up.

Coolant helps protect the engine cooling system, but coolant types can vary. Some products are ready mixed, while others need diluting before use. It is important not to mix incompatible coolant types unless the product guidance says it is safe.

Screenwash is simple but essential. It helps remove dirt, road spray, insects and winter grime from your windscreen. For colder months, choose a screenwash suitable for low temperatures and follow the dilution guidance on the bottle.

Brake Fluid, Power Steering Fluid and Transmission Fluid

Brake fluid, power steering fluid and transmission fluid are more specific than general top-up products. They must match your vehicle’s requirements, and some systems may need professional attention if levels are low or the fluid looks contaminated.

Brake fluid is safety-critical, so always use the correct type listed for your vehicle. If brake fluid keeps dropping, there may be a leak or mechanical issue that needs checking by a qualified professional.

Power steering and transmission fluids also vary by vehicle. Some cars use specific automatic transmission fluid, manual gearbox oil or hydraulic fluid. Check the correct specification carefully before buying.

Synthetic Oil vs Semi-Synthetic and Mineral Oil

Different engine oils suit different vehicles and servicing needs. Fully synthetic oils are commonly used in many modern engines and may be required by certain manufacturer specifications. Semi-synthetic oils may suit some older or less demanding applications, while mineral oils are usually associated with specific older vehicles or machinery.

The trade-off is not simply price versus quality. The right oil is the one that matches your vehicle’s required grade and specification. Using an oil that does not meet the correct standard may not provide the protection your engine needs.

If you are unsure, check your handbook, oil cap guidance, service records or ask a qualified mechanic before buying.

Ready-Mixed Fluids vs Concentrates

Ready-mixed fluids are convenient because they can usually be used straight from the bottle, where the product instructions allow. They are practical for quick top-ups, emergency kits and drivers who want a simple option.

Concentrates may be better value for regular use, but they often need diluting correctly before use. This is common with some coolants and screenwash products. The trade-off is convenience versus flexibility.

Always follow the mixing guidance on the product label. Using the wrong dilution can reduce effectiveness, especially in cold weather or demanding driving conditions.

Useful Oils and Fluids to Keep in Your Vehicle Kit

For everyday driving and travel, it can be useful to keep spare screenwash, the correct engine oil, de-icer, a funnel, gloves, cloths and a tyre pressure gauge in your vehicle or garage.

For camping, towing or long-distance trips, check all key fluid levels before setting off. This is especially important if your vehicle will be heavily loaded with tents, bikes, luggage, cooking gear or caravan equipment.

Before storing oils and fluids, make sure lids are secure and containers are kept upright where required. Keep all automotive fluids away from children, pets, food and drinking water.

Using and Disposing of Vehicle Fluids Safely

Always read the product label before use. Wear gloves where recommended, avoid contact with skin and paintwork, and clean spills promptly. Do not pour vehicle fluids into drains, onto the ground or into general waste.

Used oil, old coolant, brake fluid and other automotive fluids should be disposed of responsibly through suitable recycling or waste facilities. If you are carrying out maintenance at home, plan disposal before you start.

If a fluid level drops quickly, warning lights appear, or you are unsure what to use, get professional advice. Topping up may help in the short term, but it does not fix leaks, worn parts or system faults.

Shop Oils and Fluids Online

Browse our oils and fluids range to find practical vehicle maintenance essentials for cars, vans, campervans, caravans and road trips. Compare engine oils, coolants, screenwash, brake fluid, transmission fluids, power steering fluid and seasonal motoring products to choose the right option for your vehicle.

Oils and Fluids FAQs

What oils and fluids does my car need?

Most cars use engine oil, coolant, brake fluid, screenwash and, depending on the vehicle, power steering fluid, transmission fluid, AdBlue or other specialist fluids. Check your vehicle handbook for the correct products and specifications.

How do I choose the right engine oil?

Choose engine oil by checking your vehicle’s required viscosity grade and manufacturer specification. Do not rely on brand, price or bottle colour alone, as the oil must match your engine’s needs.

Can I mix different engine oils?

It is best to avoid mixing different oils unless necessary and only if they meet the correct specification for your vehicle. For a proper oil change or ongoing use, choose the correct oil recommended for your engine.

What coolant do I need for my car?

The correct coolant depends on your vehicle and cooling system requirements. Check your handbook or service information, and avoid mixing coolant types unless the product guidance confirms compatibility.

Is ready-mixed coolant better than concentrate?

Ready-mixed coolant is convenient because it can usually be used straight from the bottle. Concentrate may offer more flexibility but must be diluted correctly according to the product instructions.

What screenwash should I use in winter?

For winter driving, choose a screenwash suitable for low temperatures and follow the dilution guidance on the bottle. Winter screenwash can help reduce freezing and improve visibility in cold, dirty conditions.

How often should I check vehicle fluids?

It is sensible to check key fluids regularly and before long journeys. Engine oil, coolant and screenwash are common checks, while brake fluid and other system fluids should be monitored according to your vehicle guidance.

Can I top up brake fluid myself?

You should only top up brake fluid with the correct type for your vehicle and if you are confident doing so. If the level is low or keeps dropping, get the braking system checked by a qualified professional.

What is AdBlue used for?

AdBlue is used in some diesel vehicles with selective catalytic reduction systems. Only vehicles designed for AdBlue need it, so check your vehicle handbook or dashboard guidance before buying.

How should I store oils and fluids?

Store oils and fluids in their original containers, tightly closed, upright where required and away from children, pets, heat, food and drinking water. Follow the storage guidance on each product label.

How do I dispose of used oil or vehicle fluids?

Used oil and automotive fluids should be taken to a suitable recycling or waste disposal facility. Do not pour them into drains, onto the ground or into household waste.

What should I do if I use the wrong fluid?

Do not continue driving or running the system if you think the wrong fluid has been used. Stop safely and get advice from a qualified mechanic, as using an incorrect fluid can cause damage.