Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service levels, popularity trends, and more. The rankings reflect our opinion and should be a good starting point for shopping. By purchasing the products we rank, you’ll get the lowest price we found while we may receive a commission at no cost to you, which will help us continue to provide you with value.
Best Choice Liqui Moly 
Liqui Moly Fuel System Cleaner/Conditioner 500 ml Suitable for both gasoline and diesel enginesLiqui Moly 
Liqui Moly Diesel Clean and Boost 1 Liter Removes deposits from the entire fuel systemLiqui Moly 
Liqui Moly DI Jectron Direct Injection Cleaner 300 ml Cleans the injection system for improved performanceBest Value K&N 
K&N Performance+ Fuel System Cleaner: Restores Performance and Acceleration, 16 Ounce Bottle Treats up to 21 Gallons, 99 RESTORES PERFORMANCE: Cleans entire fuel system to help restore lost engine powerNulon 
Nulon Petrol Fuel System Cleaner 500 ml Cleans injectors, fuel lines, fuel tank, inlet valves and manifolds in one tankfulSTA-BIL 
STA-BIL Fuel Stabiliser, 473 ml Keeps fresh fuel fresh for quick, easy starts after storageNulon Nulon PIC Petrol Injector Cleaner 300 ml Cleans fuel injectors and carburettors in one tankfulLiqui Moly Liqui Moly Diesel Purge Plus Pro-strength Fuel System Cleaner 500mL 2790 Brand Liqui MolyLiqui Moly LIQUI MOLY Cera Tec 21676 I Ceramic Wear & Tear Protection for Petrol & Diesel Engines I Smoother Engine Performance, Le SMOOTHER ENGINE PERFORMANCE FROM VERY FIRST USE: An engine additive formulated with high-tech ceramic compounds, high thLucas Oil LUCAS Fuel Treatment, 0.16 litre, Each Cleans and lubricates the fuel system24% Off Castrol  NewCastrol Fuel Doctor Fuel Conditioner for Diesel, Petrol and Two-Stroke Fuel Systems - 1 Litre Fuel Doctor Fuel Conditioner is specifically formulated for Diesel, Petrol and Two-stroke fuel systemsChemtech  NewChemtech Diesel Power Fuel Additive 300 ml Prevents and kills algae and bacteria in fuel lines and storage tanksPenrite  NewPenrite Petrol Total System Cleaner Additive 375 ml Cleans fuel tank, lines, injectors, carburettors and inlet valvesNulon  NewNulon Pro-Strength Diesel Fuel System Extreme Clean 500 ml Cleans and lubricates entire fuel system in one tankChevron  NewChevron Techron Concentrate Plus Fuel System Cleaner - 12 oz. Cleans, restores, protects the entire fuel system (fuel injectors, carburetors, intake valves and combustion chambers)Liqui Moly  NewLIQUI MOLY Tappet Stop Noise | 300 ml | Oil additive | SKU: 2783 High performance additiveLiqui Moly  NewLIQUI MOLY Hybrid Additive | 250 ml | Petroladititive | SKU: 21697 Good corrosion protectionLucas Oil  NewLucas Oil Safeguard Ethanol Fuel Conditioner/12x1/ 16 Ounce Cleans injectors, valve seats, combustion chambers and other critical fuel components23% Off Nulon  NewNulon Pro-Strength Diesel Turbo Cleaner 500 ml Improves combustion and restores engine powerSTA-BIL  NewSta-Bil Fuel Treatment Stabilizer 236 ml Helps keep gasoline fresh for up to 24 monthsSTA-BIL STA-BIL Fast Fix Small Engine Treatment, 236 ml Eats away at gum and varnish that cause rough starts / no startsPenrite Penrite Petrol Injector Cleaner Additive 375 ml Cleans blocked fuel injectors and carburettorsRislone Rislone Petrol Fuel System Treatment, 500 ml Complete fuel system cleanerChemtech Chemtech Diesel Power Fuel Additive 1 Litre Prevents and kills algae and bacteria in fuel lines and storage tanksRed Line Redline Oil 85 Plus Diesel Fuel Additive 354ml Comes with full manufacturer warrantyPenrite Penrite Diesel Injector Cleaner Additive 375 ml Cleans blocked injectors and reduces nozzle blockagesPenrite Penrite Diesel Enviro+ DPF Cleaner Additive 375 ml Formulated to clean blocked DPF'sNulon Nulon Pro-Strength Petrol Fuel System Extreme Clean 500 ml Product Type: Auto AccessoryLucas Oil Lucas Oil Fuel Treatment - 1 Gallon (3.78L) #10013 Clear Yellow Cleans and lubricates the fuel systemSea Foam Sea Foam Marine Pro Fuel Additive, Treatment for Marine engines, Helps clean Fuel injectors & Carburetor,Clean and Lubri Add to fuel system to clean fuel injectors & carburetor jetsLiqui Moly  NewLIQUI MOLY Diesel Particulate Filter Protector | 250 ml | Diesel additive | SKU: 7180 Highly effective additive that reduces the build-up of particulates and thus increases the service life of the diesel paNulon  NewNulon Diesel Fuel Detox 1 Liter Restores fuel economy and boosts engine performance13% Off Liqui Moly  NewLIQUI MOLY Viscoplus for Oil | 300 ml | Oil additive | SKU: 21695 Optimum lubrication under all operating conditionsLucas Oil  NewLucas Fuel Treatment, 12x1, Quart Cleans and lubricates the fuel systemGreen Planet Nutrients  NewGreen Planet Dual Fuel Starter Kit - 2 Hydroponic Base Nutrients and 2 Additives Green Planet Dual Fuel Starter Kit - 2 Hydroponic Base Nutrients and 2 AdditivesSea Foam  NewSea Foam IC5 Fuel Injector Cleaner, 5.25 oz Add To Fuel To Help Clean Fuel Injectors And Restore Injector Spray PatternsSea Foam  NewSea Foam High Mileage Motor Treatment Gas & Oil Additive, HM16, 16 oz Sea Foam High Mileage works to keep higher mileage cars and trucks on the road longer.Wiley  NewFuel Additives: Chemistry and Technology Fuel Doctor Chamber Pack- 1 Litre  NewFuel Doctor Chamber Pack- 1 Litre STA-BIL  NewSTA-BIL Small Engine Pro Multi-System Additive, 473 ml Multi-system gas and oil additiveHeet  NewHeet Iso-HEET Water Remover And Premium Fuel Line Antifreeze + Injector Cleaner Helps Increase Gas Mileage Improves Engi Gold Eagle Iso-Heet Water Remover & Anti Freeze 12 Oz13% Off Liqui Moly  NewLIQUI MOLY DEF Anti Crystal Additive Concentrate | 2.5 L | Fuel Additive Diesel | Item No.: 21800, Colourless For the prevention of interference in the SCR system of diesel enginesStanadyne  NewStanadyne Performance Formula Diesel Fuel Additive 2 Pack of 1/2 Gallon Jugs - Part # 38566 Made in the U.S.A. Restores/Increase Horsepower.Nulon  NewNulon Petrol Fuel System Cleaner 150 Ml Bottle PIC150 Nulon Petrol Fuel System Cleaner 150 Ml Bottle Pic150Fuel Doctor Chamber Pack- 250 mls  NewFuel Doctors Chamber Pack Cleaner & Conditioner 250ml FDW02 STA-BIL  NewSta-Bil Marine Ethanol Treatment and Fuel Stabilizer 946 ml Vapor technology protects engine and fuel system above and below the fuel lineLucas Oil  NewLucas Oil Heavy Duty Oil Stabilizer - 1 Quart (946mls) Increase oil life at least 50% longerStanadyne  New4 Bottles of Stanadyne 38564 Performance Formula 8 oz Diesel Fuel Additive Restores/Increase Horsepower: detergents clean deposits in the injection systemSTA-BIL  NewSTA-BIL Diesel Fuel Stabiliser, 946 ml Cleans and lubricates fuel injectors to improve performanceLiqui Moly  NewLiqui Moly 2007 Jectron Gasoline Fuel Injection Cleaner - 300 ml Cost Effective Maintenance  NewCRD Fuel Enhancer Diesel Additive, Injector Cleaner & Lubricant 33% Off Penrite  NewPenrite Octane Booster Additive 375 ml Prevents engine detonation damageCeramizator  NewCeramizator CP-D Diesel Fuel Additive - Uprgades And Improves Fuel Quality - Fuel Pump and Injector Cleaner Laser  NewLaser 8021 Fuel & Additive Funnel - Diesel, Grey|Silver Outlet diameter: 24.5mm. For diesel fuel fillers only.Liqui Moly  NewLIQUI MOLY Oil Additive Cera Tec 20002 Ceramic Wear & Tear Protection for Petrol & Diesel Engines Smoother Engine Perfor Mixable with all commercially available motor oilsSTA-BIL  NewSTA-BIL Marine Fuel Treatment and Stabiliser, 236 ml Removes water from fuel to help prevent fuel separationArchoil  NewArchoil Diesel Fuel System Kit - AR6500 Diesel Treatment (40.6oz) + AR6400-D Diesel Fuel System Cleaner… Includes AR6500 Diesel Treatment (40.6 oz)BOOSTane  NewBoostane Fuel Additive Shot Octane Booster 118ml Bottle Gas Salts & Co  NewSalts & Co Pure Magnesium Flakes Bath Salts Pail 1.5 kg Our most powerful, healing bath soak for a stronger recovery from intense training. Our SaltsAndCo Pure Magnesium Bath FDusehu  NewAutomotive Fuels Additives - Car Fuels Injector Cleaner, Fuels System Cleaning - Cleaner Additive for Car Cleans, Reduce ↦Enhance fuelss effectiveness and sustainability: This detergent assists gasolines to dissolve more fully, which reducesZalizr  NewZalizr 3 Pack Universal Petrol Filter Kit with Grass Trimmer Fuel Line, Fuel Primer Bulb and Fuel Tank Seal Grommet, Com Complete Fuel Hose Kit: This 3 pack kit includes 3 fuel hoses, filters, gaskets, 3 fuel tank seal grommets, and 3 primer29% Off Liqui Moly  NewLIQUI MOLY Petrol Injection Cleaner | 300 ml | Petroladititive | SKU: 2786 Highly effective combination of agents that cleans and protectsBlack Belt Protein  NewPure Creatine Monohydrate 1KG (Pharmaceutical Grade) (Micronized) Creatine Monohydrate is one of the most researched and cost effective supplements in the world. It significantly increasRVS Technology  NewRVS Technology G6 Engine oil Treatment; For Gasoline Engines with a Motor oil capacity up to 6 quarts; Save fuel, Boost Cost savings through better fuel and total economy (up to 20%)Liqui Moly  NewLiqui Moly MoS2 Friction Reducer 300 ml Increases smooth operation and reduces friction and wearWiley  NewFuels and Fuel-Additives PUCHEN  NewFuels Cleaner Additive for Car | 120ml Multifunctional Fuels Additive Powerful,Effective Engine Cleaner, Efficient Injec ⇔System Revitalization: Multipurpose formula specifically designed to clean, protect, and restore the performance of youLiqui Moly  NewLIQUI MOLY Speed Petrol Additive 1 Litre Petrol Additive Item No. 5105 Colourless For carburettor and injection enginesWynn's  NewWynn's Lead Substitute - Protects Against Wear in Unleaded Petrol Engines - Prevents Oxidation, Fuel Degradation & Depos ✅ VALVE SEAT PROTECTION FOR UNLEADED PETROL ENGINES: Ensures optimal protection for valve seats in engines that run on uTop Athlete  NewTop Athlete Ultimate Carbohydrates Powder | Unflavoured Vegan Pre Workout & Post Workout Energy Drink Powder | Preworkou Pre Workout Energy Boost: This unflavoured pre workout powder is a clean carbohydrate source designed to support enduranHutson Street Press  NewFuels and Fuel Additives for Highway Vehicles and Their Combustion Products SZZLDAQD  NewFuel Additive Tank Pump,Compatible With Citroen Berlingo C4,Compatible With Peugeot Partner 208 1007 2008 1525LK, 1525HP Integrated Design: Integrate functions such as pressure regulation and metering to save space and make installation convFRIPPS  New3Pcs G17 Fuel Cleaner - Bafu G17 for Cars,Bafu Fuel Cleaner,Fuel System Additive Exhaust Carbon Deposits Removal,Simple Powerful Fuel System Cleaner ----- G17 Fuel Cleaner Effectively Removes Dirt, Debris, And Varnish Buildup In Your Car'SGumout  NewGumout 510013 High Mileage Fuel Injector Cleaner, 6 oz. (Pack of 6) Specially formulated to remove carbon deposits from engines with over 75,000 milesLAP Lambert Academic Publishing  NewDiesel Fuel Additives Diesel Fuel AdditivesNoyes Publications  NewChemical Additives for Fuels: Developments Since 1978 Diyeeni  NewDiyeeni Magnetic Fuel Additive Bottle Storage Rack, Fuel Additive Holder Compact Wall Mount for Trucks Rugged ABS Material: Constructed from excellent ABS plastic, this fuel additive bottle rack is designed to withstand harBentham Science Publishers  NewThe Production of Biodiesel and Related Fuel Additives (Recent Advances in Renewable Energy Book 6) LAP LAMBERT Academic Publishing  NewThe Interest of combining an additive with fuel blends: The role of fuel additives Springer  NewChemical Additives for Gas Hydrates (Green Energy and Technology) Hyuduo  NewHyuduo Magnetic Fuel Additive Bottle Holder Wall Mounted ABS Compact Organizer for Fuel Treatment Bottles with Strong Ma [Stable and Reliable Hold] Designed to hold your bottles securely, even on rough roads and in challenging work environmeChemical Industry Press  NewFuel Additive Production and Application of Technology(Chinese Edition) LAP Lambert Academic Publishing  NewDiesel Fuel Additives from Vegetable Oils Diesel Fuel Additives from Vegetable Oils NewFuel Additives for Internal Combustion Engines: Recent Developments The Law Library  NewFuels and Fuel Additives - Renewable Fuel Standards, 2013 (US Environmental Protection Agency Regulation) (EPA) (2018 Ed ICON Group International, Inc.  NewThe 2026-2031 World Outlook for Fuel Additives ICON Group International, Inc.  NewThe 2026-2031 World Outlook for Specialty Fuel Additives LAP LAMBERT Academic Publishing  NewINVESTIGATION ON EFFECT OF FUEL ADDITIVES IN CI ENGINES ICON Group International, Inc.  NewThe 2026-2031 World Outlook for Fuel Additives and Lubricants The Law Library  NewRegulation of Fuels and Fuel Additives - 2012 Renewable Fuel Standards (US Environmental Protection Agency Regulation) ( The Law Library  NewRegulation of Fuels and Fuel Additives - 2012 Renewable Fuel Standards (US Environmental Protection Agency Regulation) ( ICON Group International, Inc.  NewThe 2026-2031 World Outlook for Jet Fuel Additives ICON Group International, Inc.  NewThe 2026-2031 World Outlook for Fuel Additive Solutions The Law Library  NewRegulation of Fuels and Fuel Additives - Renewable Fuel Standard Program (US Environmental Protection Agency Regulation) ICON Group International, Inc.  NewThe 2021-2026 World Outlook for Fuel Additives ICON Group International, Inc.  NewThe 2025-2030 World Outlook for Fuel Additives and Lubricants Noyes Data Corporation,U.S.  NewFuel Additives for Internal Combustion Engines: Recent Developments ICON Group International, Inc.  NewThe 2026-2031 World Outlook for Deposit-Control Specialty Fuel Additives Generic  NewDiesel Pack, Engine Treatment, Fuel Additive, Oil Additive - Large 1x 5L AW10 AntiwearICON Group International, Inc.  NewThe 2025-2030 World Outlook for Fuel Additive Solutions