Best Engine Oil Additives Deals Online in the UK (25 Deals Found)

Last Updated - 20/08/2025 Sort By:

Best Choice
Wynn's

New
Wynn's Super Charge Oil Treatment - Enhances Viscosity - Restores Compression & Pressure - Reduces Oil Consumption & Smo
✅ IMPROVES THE VISCOSITY INDEX AND STRENGTHENS OIL FILM: Enhancing the viscosity index of lubricating oils is essential

£8.29
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Best Value
Liqui Moly

New
LIQUI MOLY Oil Additive | 300 ml | Oil additive | SKU: 2591
Item Package Length: 5.5cm

£5.42 £8.37
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New
LIQUI MOLY MOS2 ENGINE OIL ADDITIVE 300ML - MADE IN GERMANY - 2591
Liqui Moly Oil Additive Features Colloidal solid lubricant suspension based on molybdenum disulfide (MoS2) in mineral oi

£19.90
10% Off
Liqui Moly

New
LIQUI MOLY Cera Tec 3721 I Ceramic Wear & Tear Protection for Petrol & Diesel Engines I Smoother Engine Performance, Les
SMOOTHER ENGINE PERFORMANCE FROM VERY FIRST USE: An engine additive formulated with high-tech ceramic compounds, high th

£19.89 £22.22
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New
Nano Engine Oil Treatment Additive + Friction Reduction for Petrol Diesel Engine
Product Title: 30ml Wonder Graphene Engine Additive for Improved Performance and Longevity. Revolutionize your engine's

£21.00
Liqui Moly

New
Liqui Moly 2770 - Engine Oil Additive
Prevents hydro tappet noise. Lubrication holes and ducts in the oil circuit are cleaned. Secures optimal hydro tappet pe

£8.13 £8.56
14% Off
Slick 50

New
Slick-50 61399750 Engine Treatment 750ml
Helps to protect the engine against fiction and heat when operating under stress, such as towing, carrying heavy loads o

£19.57 £22.99
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New
Liqui Moly Hydraulic Valve Lifter Oil Additive Treatment Petrol Diesel Engine 1x
One 300 ml can of Liqui Moly hydraulic tappet additive is sufficient for up to 6 liters motor oil. After adding, run the

£10.99
15% Off
Lucas Oil

New
Lucas Oil 10001 Heavy Duty Oil Stabiliser, 946 ml
Increases oil life at least 50% longer

£16.99 £19.99
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New
Oil Engine Additive Nano Graphene Treatment Petrol Diesel Car Smoke Rings Repair
This cutting-edge nano additive transforms your vehicle's performance with our patented G-LAY (Graphene Layer) technolog

£21.00
45% Off
Liqui Moly

New
LIQUI MOLY Pro-Line Engine Flush | 500 ml | Oil additive | SKU: 2427
Cleans the engine from the inside

£9.29 £17.09
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Wynn's

New
Wynn's Engine Oil Stop Leak - Prevents & Stops Oil Leaks - Restores Elasticity of Seals & O-Rings - Lubricates & Protect
✅ PREVENTS AND STOPS ENGINE OIL LEAKS WITHOUT DISASSEMBLY: A powerful formulation designed to effectively stop and preve

£7.99 £8.84
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New
MANNOL 9990 Motor Doctor 300ml Engine Oil Additive Anti Friction Stop Smoke
MANNOL Motor Doctor. - A special modifier increases the oil viscosity index, which prevents oil from entering the combus

£7.19
Wynn's

New
WYNNS Formula Gold Engine Oil Treatment - Improves Compression & Reduces Wear - Enhances Oil Viscosity & Cleans Engine I
✅ DOUBLE ACTION FORMULA FOR ENGINE OPTIMIZATION: Formulated as a fully oil-soluble chemical treatment, this product deli

£14.95
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New
Slick 50 Engine Treatment Oil Additive Treatment 500ml 61399500
Instructions: Pour directly into the engine. Do not overfill. If carrying out a full oil and filter change drain oil and

£18.24
MANNOL

New
MANNOL Ceramo Ester Engine Oil Additive 250ml
The additive gives the oil the following properties:

£10.05
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New
Liqui Moly Car Diesel Petrol Oil Additive Engine Treatment 300ml - Part 2591
LIQUI MOLY MOS2 (2591) ENGINE OIL ADDITIVE 300ML - MADE IN GERMANY. Shake before use. Add 5 % (50 ml per 1 l of oil) to

£8.79
New
Liqui Moly Hydraulic Valve Lifter Engine Oil Additive Petrol Diesel 300mL 2770
One 300 ml can of Liqui Moly hydraulic tappet additive is sufficient for up to 6 liters motor oil. After adding, run the

£8.79
New
Wynns Super Charge Oil Treatment Car Additive Petrol Diesel Engine 300ml
Strengthens the oil film at high temperatures and in case of heavy load. Improves the viscosity index of lubricating oil

£8.75
New
MANNOL 9829 CERAMO ESTER ENGINE OIL FUEL ADDITIVE ANTI FRICTION DIESEL 250ML
(MANNOL Ceramo Ester 250ml. petrol, four-stroke and two-stroke and for all types of oils – mineral, semisynthetic, synth

£10.05
New
MANNOL Oil Leak-stop Engine Oil Additive Restores Elasticity Seals Gasket 300ml
Oil Leak-Stop is a special engine oil additive made by using unique technologies. Compatible with any engine oil and sui

£8.99
New
Liqui Moly Engine Flush Plus Additive Oil Cleaner 300ml - Part 8374
300 ml sufficient for up to 6 l of oil. Then allow engine to idle for approx. 10 minutes. Then change the oil and the fi

£8.59
New
Slick 50 Engine Treatment Oil Additive Petrol & Diesel Extends Engine Life 750ml
Friction Modifier. Extends engine life. Proprietary formulation creating enhanced layer of lubrication to minimize heat

£23.69
New
Liqui Moly Cera Tec Ceratec 300ml High-Tech Ceramic Oil Additive Engine Protect
Liqui Moly Engine Flush Plus Oil 300ml Petrol Diesel Additive 8374 2Units. Liqui Moly Catalytic System Additive Fuel Cle

£24.99
New
LIQUI MOLY (2427) PRO-LINE ENGINE FLUSH - 500ML - MADE IN GERMANY
Liqui Moly Pro Line Visco Plus 1L High Performance Oil Additive 5196 2 Units. Liqui Moly Pro Line Visco Plus 1L High Per

£12.99

25 Engine Oil Additives deals are available from: Amazon, eBay stores, starting from £5.42.
The biggest discount we found is 45% on LIQUI MOLY Pro-Line Engine Flush | 500 ml | Oil additive | SKU: 2427 at Amazon.
The lowest price we found is £5.42 while the highest is £24.99.
Prices for the best Engine Oil Additives deals average at £13.38.
Last updated on August 20, 2025.
We scanned these quality online stores and more to deliver you with the best offers online available for Engine Oil Additives.