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Castrol
Castrol for Porsche
Castrol lubricants for Porsche bring a long-established oil brand to a wide range of engines and drivetrains, helping owners match the correct specification to their model and usage
A Quick Look at Castrol
Castrol was founded by Charles “Cheers” Wakefield under the name of ‘CC Wakefield & Company’. In 1899 Charles left a job at Vacuum Oil to start a new business selling lubricants for trains and heavy machinery.As well as having a heritage of passion and speed, the Castrol brand also stands for innovation and performance:Today Castrol is developing and testing new products and business models to adapt to developments in sustainability, mobility and digitisation.
Choosing the Right Fit for Your Porsche
Where Castrol is listed for Porsche, use the supplied model coverage and OE references to confirm suitability. Check details that commonly affect fitment such as model year, side/position, and connector type where relevant.
- Typical reasons people choose these lubricants include improving cold-start protection, stabilising oil pressure at operating temperature, and reducing wear in road and fast-road use.
- Common oil-related symptoms that prompt a change are noisy tappets on cold start, rising oil consumption, varnish or sludge from missed servicing, and gearbox shift quality degrading when cold.
- Practical ownership tips include always matching viscosity and approval to the Porsche engine and climate, and changing the filter while checking carefully for leaks at each oil change.
Browse by Category
If you already know the area you are working on, start with the category and then filter by Porsche model. Where real-world symptoms and typical reasons to replace are provided, use them to keep the wording grounded.
Engine Cooling — Cooling components are changed when there are leaks, overheating, repeated low coolant warnings or ageing hoses and clamps, because failures here can quickly lead to serious engine damage on a Porsche.
Water / Coolant Radiators — Radiators are replaced when corrosion, impact damage, or internal blockage reduce cooling performance or cause leaks, as running hot in traffic or under load risks expensive engine damage.
Engine Oil — Engine oil is renewed regularly to maintain lubrication, cooling and oil pressure; owners may switch oil type to address consumption on higher-mileage engines, improve cold-start protection, or better cope with hard use.
Service Parts — Service items such as filters, plugs, belts and fluids are replaced on schedule to keep Porsche engines and systems reliable, efficient and protected, often resolving multiple minor symptoms in one service.
Engine Oil & Lubricants - Castrol — Castrol oils and fluids are chosen where an appropriate approval and viscosity match is required for a Porsche engine, supporting wear protection, deposit control and consistent performance over the intended interval.
Explore Castrol at Design911
View the current Castrol range for Porsche at Design911, then filter by model and category to narrow down to the right parts.
Molub-Alloy Paste White T – High Performance Assembly & Anti-Fretting Paste
Molub-Alloy Paste White T is a premium high-performance assembly paste designed to provide exceptional protection against fretting corrosion, stick-slip, wear, and seizure in demanding automotive, industrial, and workshop applications.
This white assembly paste applies cleanly and appears almost colourless when spread as a thin layer, making it ideal for precision assembly work where cleanliness and protection are equally important.
Formulated for universal assembly and thin-film lubrication applications, Molub-Alloy Paste White T helps simplify component assembly and future disassembly while protecting contact surfaces against corrosion, vibration-related wear, and moisture ingress.
Its advanced formulation provides excellent resistance to both hot and cold water while delivering long-lasting corrosion protection under harsh operating conditions.
Particularly effective in applications exposed to vibration and frictional movement, the paste helps prevent fretting corrosion and reduces stick-slip behaviour, making it ideal for hydraulic cylinders, open lubrication points, threaded assemblies, sliding surfaces, and mechanical components subject to oscillating movement.
The product also helps eliminate squeaking noises and improves smooth operation in moving assemblies exposed to high loads and thermal stress.
Suitable for temperatures ranging from -30°C to +250°C, Molub-Alloy Paste White T delivers reliable lubrication and anti-corrosion performance across a wide range of workshop, automotive, and engineering environments.
Key Features
• High-performance white assembly paste
• Prevents fretting corrosion and surface wear
• Clean application with almost colourless thin-film appearance
• Helps simplify assembly and future disassembly
• Excellent anti-seize and separating properties
• Resistant to hot and cold water
• Reduces stick-slip and frictional vibration
• Helps eliminate squeaking noises
• Provides long-lasting corrosion protection
• Suitable for hydraulic cylinders and moving assemblies
• Wide operating temperature range from -30°C to +250°C
• Suitable for automotive, engineering, and industrial applications
Applications
Molub-Alloy Paste White T is ideal for:
• Assembly lubrication
• Anti-fretting protection
• Threaded fasteners and fittings
• Hydraulic cylinders
• Sliding and contact surfaces
• Open lubrication points
• Components exposed to vibration
• Mechanical assemblies requiring anti-seize protection
• Automotive workshop applications
• Industrial machinery and engineering assemblies
Why Use Molub-Alloy Paste White T?
Mechanical components exposed to vibration, friction, heat, and moisture can suffer from fretting corrosion, seizure, stick-slip, and accelerated wear.
Molub-Alloy Paste White T helps protect components by:
• Reducing friction between contact surfaces
• Preventing corrosion and seizure
• Improving assembly and removal
• Minimising vibration-induced wear
• Protecting against moisture and contamination
This makes it ideal for long-term component protection and reliable assembly work.
Temperature Performance
Designed for demanding operating conditions, Molub-Alloy Paste White T remains effective across a wide temperature range:
• Operating temperature: -30°C to +250°C
• Suitable for hot and cold operating environments
• Maintains lubrication and protection under thermal load
Clean & Professional Assembly Solution
Unlike darker anti-seize compounds, this white assembly paste offers a cleaner, more professional appearance during application and servicing.
Benefits include:
• Cleaner working environment
• Reduced visible residue
• Easier inspection during assembly
• Professional workshop finish
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12 Month Warranty
Worldwide Delivery
React SRF Racing Brake Fluid – High Performance Motorsport Fluid 1ltr
React SRF Racing is an ultra high-performance brake fluid engineered for the most demanding driving conditions, including motorsport and high-performance track use. This is Not your standard DOT 4 – much higher spec
With a dry boiling point exceeding 300°C, this advanced brake fluid delivers exceptional resistance to vapour lock, maintaining consistent braking performance even under extreme heat and sustained heavy braking.
Unlike standard brake fluids, React SRF Racing is formulated to retain its high vapour lock resistance throughout its service life, ensuring dependable performance over extended use.
Supplied in a convenient 1 litre bottle, it is the ideal choice for performance enthusiasts, track day drivers, and professional motorsport applications.
Key Features
• Extremely high dry boiling point (over 300°C)
• Outstanding resistance to vapour lock
• Maintains performance throughout service life
• Designed for motorsport and high-performance use
• Suitable for extreme braking conditions
• Supplied in 1 litre bottle
Performance Benefits
Consistent Braking Under Extreme Heat
Maintains braking efficiency even during prolonged track use.
Superior Vapour Lock Resistance
Prevents brake fade in high-temperature conditions.
Long-Lasting Performance
Retains key properties throughout its service life.
Applications
Ideal for:
• Motorsport and racing applications
• Track day vehicles
• High-performance road cars
• Upgraded braking systems
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12 Month Warranty
Worldwide Delivery
For accurate measurement of lubricants in imperial volumes as shown in the vehicle handbook.
Available in -
- half pint
- pint,
- quart
- full set of three
These handy metal pouring jugs not only look good in your garage but are useful too.
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12 Month Warranty
Worldwide Delivery
Classic Pump Oil Can - 500ml
The classic Castrol oil applicator. Pump action screw top cans supplied with exchangeable fixed and flexible applicators.
These period style oil cans are great for lubricating hard to reach places
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12 Month Warranty
Worldwide Delivery
Classic Pump Oil Can - 200ml
The classic Castrol oil applicator. Pump action screw top cans supplied with exchangeable fixed and flexible applicators.
These period style oil cans are great for lubricating hard to reach places
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
J120
The product you are viewing cross references to these numbers
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12 Month Warranty
Worldwide Delivery
Castrol Classic Two Tone Mug
Traditional style enamelled tin mug.
Perfect for a cuppa or to hold those important screws that you don't want to misplace
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12 Month Warranty
Worldwide Delivery
Castrol Classic China Mug
Classic china mug.
Traditional china mug with the Classic Castrol logo on both sides.
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12 Month Warranty
Worldwide Delivery
Castrol Classic Two Tone Mug
Classic two tone china mug.
Castrol green with a white interior featuring the classic 1946 logo in both sides - perfect for the dinner table or the workshop.
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12 Month Warranty
Worldwide Delivery
20ltr Plastic container
CLASSIC XL 20w/50
Castrol Classic XL20w/50 is a premium multigrade engine oil of good all round performance. Formulated with high quality mineral oils, plus carefully selected additives, it is ideally suited to older technology and classic car engines.
- For pre-1980 classic cars and motorcycles
- A conventional 20W-50 multigrade engine oil
- Formulated with high quality mineral oils plus selected additives
- Ideally suited to older technology and classic car engines
- Offers excellent oil consumption and a very high level of engine wear protection
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
19252801
The product you are viewing cross references to these numbers
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12 Month Warranty
Worldwide Delivery
1 Gallon (4.54 Ltr) Tin
CLASSIC XL 20w/50
Castrol Classic XL20w/50 is a premium multigrade engine oil of good all round performance. Formulated with high quality mineral oils, plus carefully selected additives, it is ideally suited to older technology and classic car engines.
- For pre-1980 classic cars and motorcycles
- A conventional 20W-50 multigrade engine oil
- Formulated with high quality mineral oils plus selected additives
- Ideally suited to older technology and classic car engines
- Offers excellent oil consumption and a very high level of engine wear protection
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
1925
The product you are viewing cross references to these numbers
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12 Month Warranty
Worldwide Delivery
1ltr Tin
CLASSIC XL 20w/50
Castrol Classic XL20w/50 is a premium multigrade engine oil of good all round performance. Formulated with high quality mineral oils, plus carefully selected additives, it is ideally suited to older technology and classic car engines.
- For pre-1980 classic cars and motorcycles
- A conventional 20W-50 multigrade engine oil
- Formulated with high quality mineral oils plus selected additives
- Ideally suited to older technology and classic car engines
- Offers excellent oil consumption and a very high level of engine wear protection
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
19257176
The product you are viewing cross references to these numbers
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12 Month Warranty
Worldwide Delivery
5ltr Tin
CASTROL GTX CLASSIC 10W/40
Liquid Engineering from Castrol Classic Oils - the original is back.
Brought to you by Castrol Classic oils, Castrol GTX Classic 10w/40 is a high quality mineral engine oil for vehicles from 1978 to 1993. Produced to original formulation as specified in motor manufacturers’ vehicle handbooks. Containing anti-wear and anti-corrosion additives to provide high levels of protection necessary for older technology vehicles.
Castrol GTX Classic protects classic engines against problems like sludge, helping to extend the life of your mechanicals. With GTX Classic in your engine, there’s a great road ahead.
Castrol GTX Classic 10w/40, the original ‘Liquid Engineering’ for younger and modern classics:
- Mineral 10w/40, suitable for vehicles 1978 to 1993 where a 10w/40 oil is specified
- Period correct balanced additives for superior wear and corrosion protection, including ZDDP
- Can be used in vehicles either with or without a catalytic converter
- Suitable for both naturally aspirated and turbo-charged vehicles
- Original handbook recommendation for many vehicles
- Supplied in original style 5ltr can
- API: SG
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
1928G
The product you are viewing cross references to these numbers
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12 Month Warranty
Worldwide Delivery
Monday-Friday: 8.30am - 5.30pm (GMT)
Saturday: Closed
Sunday: Closed