Additives & Boosters

BG 245: Premium Diesel Fuel System Cleaner
325 ml

New improved chemistry for modern higher pressure diesels

Sister product to BG 244 from BG Products, BG 245 is a newer premium fuel system cleaner for diesel systems. The BG range is regarded by professionals as the best fuel system cleaners of their kind.

Today’s diesels can produce more power with less fuel than ever before. Injector tips in High Pressure Common Rail injection (HPCR) systems are designed to handle produce twice as much injection pressure as mechanical fuel injection. However, diesel fuel is not, being notoriously inconsistent and therefore a threat to HPCR systems. Injector deposits at a miniscule quantity can cause sticking and carbon begins laying on the fuel filter until it reaches a point of plugging. 

New BG 245 Premium Diesel Fuel System Cleaner removes and dissolves deposits from the entire diesel injection system, including inside fuel injectors and combustion chambers. Plus, BG 245 contains a fuel lubricity agent to protect components from wear and cetane improver for cold starts.

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BG245

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BG DOC: Diesel Oil Conditioner
325 ml

BG DOC Diesel Oil Conditioner is designed to condition oil in modern high-output diesel engines.

Modern diesel engines operate at high temperatures and pressures. This puts a lot of demand on diesel engine oils and the additives they contain. Hydraulically activated fuel injectors increase oil pressures and emissions devices increase soot accumulation in oil. These systems test the limits of engine oil. Under the right conditions, heat causes sulphur from fuel to combine with entrained moisture to create sulfuric acid. This acid wreaks havoc on engines, causing corrosive wear and severe damage to engine components.

BG DOC Diesel Oil Conditioner maintains like-new diesel engine power and performance, neutralises acids and acid corrosion, reduces friction and wear on engine parts, stabilises viscosity, prevents sludge through increased oxidation and soot control.

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BG112

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BG EPR: Engine Performance and Compression Restorer
325ml

A revolutionary formula with proven “ring-clean” technology. BG 109 Engine Performance Restoration is a quick and effective blend of cleaners that will soften, emulsify and dissolve those hard to remove fuel gums that clog rings and will usually do it in 15 minutes or less.

Modern engines operate at high temperatures. Combined with prolonged drain intervals and reduced engine cooling, automotive engine oil is under a lot of stress. Continuous thermal and oxidative breakdown contributes to oil thickening, heat retention and deposit formation. Heavy deposits can impede normal piston-ring function; thus reducing fuel economy, lowering power output, and increasing harmful exhaust emissions and oil consumption. Compression will increase with removal of these deposits.

Safe for use in petrol, diesel and rotary engines.

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BG109

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BG MGC: Multi Gear Concentrate oil supplement
177ml

• Reduces temperatures in Transmission,
• Reduces wear,
• Reduces noise in Limited Slip, differentials,
• Improves manual transmission characteristics,
• Reduces maintenance costs,
• Improves water separation,
• Extends oil life

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BG325

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BG MOA: Engine Oil Supplement Advanced Formula
325 ml

BG MOA Advanced Formula Engine Oil Conditioner is designed to enhance engine oil and extend engine oil life. The unique blend of additives in the product maintains engine cleanliness and performance under high load conditions.

Modern operating conditions of a car in the urban cycle (warm-ups, start-stop, short trips, extended intervals between oil changes) and high operating temperatures lead to a rapid depletion of the required additive package in the engine oil. This leads to the accumulation of more unburned fuel and other combustion products in the engine oil, which leads to the rapid oxidation of engine oils. Oxidation causes oil to thicken and deposits in the crankcase, oil filter, oil passages and other critical internal engine surfaces.

BG Advanced Formula MOA® Engine Oil Conditioner is designed to maximize the performance of synthetic and mineral engine oils and extend engine oil life.
The product prevents oxidation and an increase in the viscosity of the engine oil even under high load conditions.
Keeps compression rings, lifters, tensioners and other engine components clean for long engine life and lowers maintenance costs.
Excellent for gasoline engine use.
Compatible with synthetic and mineral motor oils.

Benefits:
increases the strength of the oil film
prevents oxidation and oil thickening
prevents the formation of sludge and varnish deposits when driving in the urban cycle
protects against rust and corrosion
provides increased power and performance
reduces harmful emissions into the atmosphere

Excellent long-term protection of engine parts against wear!

Used by:
Restoring the elasticity of the elements of the oil system of a gasoline engine
Restoring the elasticity of the elements of the oil system of a diesel engine
Engine oil protection

Mode of application:

For continuous engine protection, add one can (325 ml) of 4-5 liters of engine oil at every oil change
Add to the crankcase in the event of a drop in the oil level to enhance its properties between replacements
Do not overfill the crankcase

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BG115

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LIQUI MOLY A/C System Cleaner Spray - 250ml

LIQUI MOLY A/C System Cleaner is a specialist cleaning spray designed to remove bacteria, mould and unpleasant odours from vehicle air conditioning and ventilation systems.

Its effective formula cleans the air conditioning evaporator and air inlet ducts, leaving a protective film and a pleasantly fresh fragrance. It helps maintain a cleaner cabin environment without requiring complete removal of the air conditioning system.

What Does LIQUI MOLY A/C System Cleaner Do?

The cleaner removes mould and bacteria that accumulate on air conditioning evaporators and inside ventilation ducts. It helps eliminate musty smells at their source, leaving the system cleaner and the cabin air fresher.

Why Do Air Conditioning Systems Become Contaminated?

Moisture produced during air conditioning operation can collect around the evaporator, creating conditions where bacteria and mould develop.

Over time, this contamination can cause unpleasant smells when the air conditioning or ventilation system is switched on.

When Should It Be Used?

A/C System Cleaner is recommended when musty or unpleasant smells are noticeable from the ventilation system.

It can also be used during routine air conditioning servicing, particularly on vehicles frequently driven in humid conditions or used for short journeys.

Key Features

• Removes bacteria and mould from air conditioning systems.
• Eliminates unpleasant and musty ventilation smells.
• Cleans evaporators and air inlet ducts.
• Leaves a pleasantly fresh fragrance.
• Forms a protective film after cleaning.
• Helps maintain cleaner cabin air.
• No complete air conditioning system removal required.
• Suitable for petrol, diesel, hybrid and electric vehicles.
• One 250ml can treats one vehicle's air conditioning system.

Application Instructions

• Open a vehicle window and ensure the air conditioning condensate drains are clear.
• Switch off the air conditioning, select recirculation and footwell airflow, then run the engine with temperature and blower settings at maximum for 10 minutes to dry the evaporator.
• Insert the supplied spray probe towards the evaporator following vehicle-specific access instructions.
• Spray the cleaner across the evaporator surface, moving the probe carefully to distribute the product.
• Allow the cleaner to work for 15–20 minutes.
• Dry the evaporator for a further 10 minutes using the same heating and ventilation settings.
• Replace the cabin dust and pollen filter.

Important: Follow Porsche-specific service instructions where available. Keep a window open, avoid inhaling cleaning vapours and read the product's biocide safety information before use. The manufacturer recommends one 250ml container per vehicle.

Product Category Description – Porsche Air Conditioning & Cabin Ventilation Cleaners

LIQUI MOLY A/C System Cleaner provides an effective solution for cleaning Porsche air conditioning evaporators and ventilation systems, helping eliminate bacteria, mould and unpleasant cabin smells.

Suitable for compatible Porsche 911, 944, 968, 928, Boxster, Cayman, Cayenne, Macan, Panamera and Taycan models, this specialist treatment helps maintain fresh cabin air and cleaner ventilation components.

LIQUI MOLY Cera Tec Wear Protection Additive – 300ml 

LIQUI MOLY Cera Tec is a high-performance ceramic engine oil additive developed to reduce friction, minimise wear and provide long-lasting protection for internal engine components.

Its advanced formulation combines microscopic ceramic particles with chemical friction modifiers to help protect metal surfaces, improve smooth running and reduce wear during cold starts and normal operation.  Can be used in petrol, in diesel engines and compatible manual transmissions. Not to be used in automatic or PKD gearboxes

Porsche Model Compatibility

Cera Tec is suitable for consideration in Porsche models equipped with compatible conventional oil-lubricated petrol or diesel engines:

These are potential applications based on LIQUI MOLY's general engine compatibility, not individual Porsche model approvals. Check the engine oil capacity, Porsche lubricant requirements and suitability of aftermarket additives before use.

Not intended for the electric drive systems of the Porsche Taycan or all-electric Macan.

What Does It Do?

Cera Tec uses microscopic ceramic particles and chemical friction modifiers to reduce direct metal-to-metal contact inside the engine.

This helps:

• Reduce friction and mechanical wear
• Protect components during cold starts
• Improve engine smoothness
• Provide additional protection under high loads
• Support long-term engine durability

Why Is It Important?

Internal engine components experience friction whenever the engine operates, particularly during cold starts and under heavy loads.

Cera Tec provides an additional wear-protection treatment to complement the engine oil, helping reduce friction between moving metal surfaces.

When Should It Be Used?

Cera Tec can be added during routine engine oil servicing, preferably when filling with fresh engine oil.

LIQUI MOLY states that its protective effect can last for up to 50,000km.

It is a preventative wear-protection additive rather than a repair for existing mechanical damage.

Application & Dosage

• Shake the container thoroughly before use.
• Add directly to the engine / gearbox oil, ideally during an oil change.
• One 300ml container treats approximately 3–5 litres of oil.
• Adjust the quantity for larger Porsche oil capacities.
• Follow the manufacturer's normal oil change intervals.
• Do not exceed the recommended dosage.

Cera Tec is also suitable for certain manual transmissions, pumps and compressors.

Do not use in automatic transmissions, PDK/DCT gearboxes or wet-clutch differentials.

Key Features

• Advanced ceramic wear-protection technology
• LIQUI MOLY product reference 3721
• 300ml container
• Reduces friction and internal engine wear
• Helps protect during cold starts
• High thermal and mechanical stability
• Compatible with commercially available engine oils
• Suitable for compatible turbocharged engines
• Compatible with catalytic converters and particulate filters
• Long-term protection for up to 50,000km
• Suitable for compatible manual transmissions
• Not suitable for wet-clutch applications

LIQUI MOLY Cera Tec Engine Oil Additives for Porsche

LIQUI MOLY Cera Tec provides additional ceramic-based wear protection for compatible Porsche petrol and diesel engines, including classic air-cooled 911 models and modern water-cooled applications.

Its combination of ceramic particles and friction modifiers helps reduce mechanical friction, improve smooth running and protect engine components under demanding operating conditions.

Design911 supplies LIQUI MOLY engine oil additives, lubricants and maintenance products for classic and modern Porsche vehicles.

LIQUI MOLY Engine Flush Plus – 300ml

LIQUI MOLY Engine Flush Plus is a powerful engine cleaning additive designed to remove harmful deposits, sludge and contaminants from the internal engine oil system before an oil change.

These are potential applications based on the product's general petrol and diesel engine suitability, not Porsche-specific approvals. Check vehicle requirements and engine oil capacity before use.

Its cleaning formula dissolves and suspends oil-soluble and oil-insoluble deposits, allowing them to be drained away with the old engine oil. This helps restore cleanliness, reduce wear and support efficient engine operation.

Not applicable to fully electric Porsche Taycan or Macan Electric powertrains.

What Does It Do?

Engine Flush Plus cleans the internal engine oil circuit by loosening and suspending accumulated deposits.

These contaminants are then removed when the old engine oil and filter are replaced.

Why Is It Important?

Over time, engine oil can accumulate sludge, varnish and other deposits caused by heat, combustion by-products and normal engine operation.

Excessive contamination may restrict oil circulation and increase engine wear.

When Should It Be Used?

Use immediately before an engine oil change when additional internal cleaning is required.

It may be useful during routine servicing, particularly where deposits or contamination are suspected. It is not a substitute for repairing mechanical faults or blocked oil passages.

Application & Dosage

• Bring the engine oil to normal operating temperature.
• Add Engine Flush Plus to the existing engine oil.
• One 300ml container treats up to 6 litres of engine oil.
• Allow the engine to idle for approximately 10 minutes.
• Drain the old oil and replace the oil filter.
• Refill with the correct manufacturer-approved engine oil.

Do not drive the vehicle during the flushing process. Follow LIQUI MOLY's instructions and the vehicle manufacturer's servicing requirements.

Key Features

• LIQUI MOLY Engine Flush Plus
• Product reference 8374
• 300ml container
• Removes sludge and internal engine deposits
• Cleans without engine dismantling
• Suitable for petrol and diesel engines
• Tested for turbochargers
• Suitable for engines with catalytic converters and particulate filters
• Compatible with commercially available engine oils
• Gentle on common engine sealing materials
• Suitable for engines with oil-bathed timing belts
• Not suitable for wet-clutch motorcycles

LIQUI MOLY Engine Flush Plus for Porsche Engine Maintenance

Clean engine oil passages are essential for reliable lubrication and long-term engine performance.

LIQUI MOLY Engine Flush Plus helps remove accumulated deposits before an oil change, supporting cleaner engine operation in compatible Porsche petrol and diesel engines.

Suitable for consideration during servicing of classic air-cooled Porsche 911 models, modern Boxster and Cayman engines, and Porsche Cayenne, Macan and Panamera petrol or diesel engines.

Millers DIESEL POWER ECOMAX - ONE SHOT BOOST
Fuel Additive (Performance Additive)
250ML

Description
High specification diesel fuel treatment for enhanced combustion efficiency and engine cleanliness.

Application
For use in all diesel vehicles including modern Euro IV/V compliant engines. Empty complete contents into fuel tank before filling to ensure thorough mixing. One bottle treats 60 litres of fuel.

User Benefits
• Suitable for all diesel engines, especially Euro IV emission-compliant vehicles.
• Enhanced detergency package for quicker clean up and prolonged injector cleanliness.
• Increases Cetane rating of diesel by up to 5 numbers, which also provides a tangible improvement to vehicle performance.
• Improved combustion and engine cleanliness drastically reduces emissions of hydrocarbons (HC) and carbon dioxide.

Typical Characteristics:
- Specific Gravity (at 15°C) - 0.84
- Kinematic Viscosity (at 40°C, cSt)- 2.5
- Flash Point - 75°C
- Colour Appearance Odour - Pale Brown

Millers PETROL POWER ECOMAX - ONE SHOT BOOST
Fuel Additive (Performance Additive)
250ML

Description
An octane booster and detergent package adding 3 octane numbers to unleaded fuel.

Application
For use in all petrol engined vehicles. Add the contents of the bottle to 60 litres of petrol.

User Benefits
• Increases octane rating of fuel by up to 3 numbers. Increases power and mpg. Improved efficiency and cleanliness of petrol injectors
• Better cleanliness of carburettor internal components and jets. Improved inlet manifold and valve cleanliness condition. Reduces combustion chamber deposits
• Helps to control corrosion in the fuel system. Maintains catalyst efficiency and helps to invigorate catalytic convertors. Improved combustion and engine cleanliness drastically reduces emissions of hydrocarbon (HC), carbon dioxide (CO2 ) and nitrous oxide (NOx)
• Ideal for use as a pre-MOT test clean-up treatment

Typical Characteristics:
- Specific Gravity (at 15°C) - 0.84
- Kinematic Viscosity (at 40°C, cSt) - 2.5
- Flash Point - 6.6°C
- Colour Appearance Odour - Pale Brown

Millers PETROL POWER ECOMAX
Fuel Additive (Performance Additive)
500ml

Description
An octane booster and detergent package adding 2 octane numbers to unleaded fuel.

Application
For use in all petrol engines. By addition to fuel in the ratio 1 part to 1000 parts (1ml/l).

User Benefits
• Increases octane rating of fuel by 2 numbers. Improved efficiency and cleanliness of petrol injectors and carburettor jets
• Efficient detergent package to clean and maintain �as new conditions� within the engine and fuel system. Reduces combustion chamber deposits and improves inlet manifold and valve cleanliness
• Reduces emissions of hydrocarbons (HC) and carbon dioxide. Maintains catalyst efficiency and may invigorate catalytic convertors
• Tests show sharper performance, smoother running engines and improved fuel consumption

Typical Characteristics:
- Specific Gravity (at 15°C) - 0.943
- Kinematic Viscosity (at 40°C, cSt) - 16.6
- Flash Point - 66°C
- Colour Appearance Odour - Pale Yellow/Orange

MOTUL Engine Flush - 300ml

Efficiently cleans the oil system to fully benefit from the new oil
•   Extends the life span and performance of the engine
•   Prevents wear and overheating of the engine
•   Less harmful exhaust emissions

Description

MOTUL ENGINE FLUSH is designed to be used in all types of 4 Stroke engines, Gasoline and Diesel, naturally aspirated or turbocharged, with or without after treatment systems, using all kind of fuels. MOTUL ENGINE FLUSH effectively cleans deposits and clogging which appear in the engine. The removed micro-particles are then evacuated at the time of the oil drain.

MOTUL ENGINE FLUSH provides a perfect lubrication during cleaning process.

Easy to use:
Simply add to warm engine oil before each oil change, let the engine idle for about 15 minutes, then drain the oil and replace the oil and oil filter.

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114292

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MOTUL Fuel Injector Cleaner Gasoline - 300ml

Effectively Cleans Dirt and Clogs in the Fuel System

• Performance Restoration: Restores the engine's original power and performance.
• Efficiency: Reduces fuel consumption and lowers exhaust emissions.
• Universal Compatibility: Suitable for all types of gasoline engines.
  
  

Description:
MOTUL Fuel Injector Cleaner Gasoline is a powerful curative additive formulated for use in all types of gasoline engines, whether equipped with injection systems or carburetors, naturally aspirated or turbocharged, and with or without a catalytic converter. It is compatible with all gasoline fuels, including leaded, unleaded, LPG, Ethanol, and biofuels, and works seamlessly with E10 fuels (10% Ethanol).

This additive effectively cleans dirt and clogs throughout the fuel system, addressing issues like injector nozzle fouling, condensation, gumming in injectors or carburetors, and deposits in combustion chambers and on inlet valves.

MOTUL Fuel Injector Cleaner Gasoline also ensures excellent lubrication during the cleaning process, preventing removed micro-particles from redepositing.