10 bestEngine Treatmentsof November 2025
112M consumers helped this year.
12% off
1
LIQUI MOLY Cera Tec 3721 I Ceramic Wear & Tear Protection for Petrol & Diesel Engines I Smoother Engine Performance, Less Friction & Lower Fuel Consumption I Ceramic Additive 300 ml Pack of 1
Liqui Moly
9.9
38% off
2
STP Ultra 5 in 1 Diesel Fuel System Cleaner 400ml , Restores Power and Protects your Engine, Enhances Fuel Economy, Mechanical Car Cleaning Products, Concentrated Cleaning Formula, Made in the UK
STP
9.8
3
Archoil AR6900-D Max Advanced Diesel Additive Concentrate, 1L Treats 1,000L of Fuel, Diesel Fuel Injector Cleaner, DPF Filter EGR Valve Turbo Cleaner, Super Diesel Converter. (1Litre)
Archoil
9.7
4
STP Diesel Treatment 200 ml, Keeps your Fuel System Clean, Enhances Fuel Economy, Mechanical Car Cleaning Products, Concentrated Cleaning Formula, Made in the UK, Black/Blue
STP
9.5
5
LIQUI MOLY Pro-Line Engine Flush | 500 ml | Oil additive | SKU: 2427
Liqui Moly
9.2
OtherUp to 15% off
WYNNS Formula Gold Engine Oil Treatment Increase Compression And Reduces Wear Petrol & Diesel
Archoil AR6900-P Max Advanced PETROL Fuel Additive Concentrate, Treats 500L of Fuel, Petrol Injector Cleaner, GPF Turbo EGR Valve Cleaner, Super Unleaded Convertor (500ml)
Wynn's 31964 Diesel Pre-Emission MOT Test Treatment Reduces CO Emissions & Exhaust Smoke
4TRESS JLM 2 x 1L Diesel Extreme Clean Diesel Fuel System Cleaner for Detox, Engine, DPF, Turbo, EGR Non Slip Car Dash Mat (4T-2x-J02360)
6
STP GST50400EN ST50400EN Complete Petrol Fuel System Cleanner, 400 ml
STP
8.9
7
Redex Diesel Fuel System Cleaner 250ml, Diesel Additives To Remove Harmful Emissions, Maximise Performance & Increase Fuel Economy With Redex Fuel Additives For Diesel Engines, Suitable For Hybrids
Redex
8.6
8
REDEX Petrol Fuel System Cleaner 4 x 500ML
Redex
8.4
52% off
9
LIQUI MOLY Oil Additive | 300 ml | Oil additive | SKU: 2591
Liqui Moly
8.1
10
Redex Petrol System Cleaner 250ml, Petrol Injector Cleaner To Remove Harmful Deposits, Maximise Performance & Increase Fuel Economy With Redex Fuel Additives For Petrol Engines, Suitable For Hybrids
Redex
7.8
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