10 bestInternal Engine Cleanerof January 2026
112M consumers helped this year.
36% off
1
Autoglym Vinyl And Rubber Care, 500ml - Fresh Lemon Scented Interior Car Cleaner Spray Designed To Protect Your Dashboard and Other Interior Plastics, White
Autoglym
9.9
2
STP Engine Degreaser Professional Series 500ml, Penetrates and Dissolves Heavy Dirt and Deposits, Easily and Quickly Restore your Engine's Performance for a Smoother Engine
STP
9.8
8% off
3
STP Carb Spray Cleaner 500 ml, Cleans and Protects Carburettors, Linkages and Automatic Chokes, Mechanical Car Cleaning Products, Made in the UK
STP
9.6
14% off
4
Wynn's W12264 Extreme Diesel System Fuel Injector Cleaner Engine Additive Treatment 325ml
Wynn's
9.4
39% off
5
LIQUI MOLY Pro-Line Engine Flush | 500 ml | Oil additive | SKU: 2427
Liqui Moly
9.2
OtherUp to 16% off
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
Liqui Moly 1803 Injection Cleaner 300ml
Autoglym Engine & Machine Cleaner, 1L - Machine and Engine Cleaner That Rapidly Cleans Car Engines, Components, Tools and Machinery, White
STP Diesel High Milage Injector Cleaner 200 ml, Cleans and Protects your Engine for 300 miles, Enhances Fuel Economy, Mechanical Car Cleaning Products, Concentrated Cleaning Formula, Made in the UK
6
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
8.9
7
SYPRIN Diesel Cleaner 500ml - cleaning and maintenance of diesel fuel systems and motors I diesel cleaner additives for injector dpf particulate filter motor
SYPRIN
8.7
29% off
8
STP Ultra 5 in 1 Petrol System Cleaner 400ml, Restores Power and Protects your Engine, Enhances Fuel Economy, Mechanical Car Cleaning Products, Concentrated Cleaning Formula, Made in the UK
STP
8.4
17% off
9
Wynn's Professional Formula Extreme Diesel Injector Cleaner Fuel System Additive 500ml
Wynn's
8.2
20% off
10
Gunk 6868 5L Ultra Engine Degreaser,Label may vary
Gunk
7.9
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