Fuel & Oil Additives

Royal Purple Max-Boost is a concentrated octane booster and fuel treatment that raises gasoline octane, stabilizes fuel, and reduces engine knock for high-performance and forced-induction engines. Designed for racers, performance enthusiasts, and anyone running demanding engines, this 16 fl oz can of Max-Boost combines...

Lubegard 30901 Engine Oil Protectant is a 15 oz LXE-based oil additive that supplements motor oil to reduce friction, limit wear, and help keep oil cooler for longer service life. Modern engines demand more from engine oil than older test standards anticipate. Lubegard's Bio/Tech...

Quicksilver Quickleen is a concentrated 12 oz fuel and engine-system cleaner designed to remove carbon, gum and varnish from carburetors, injectors and combustion chambers. Keep engines running smoothly across a wide range of gasoline-powered equipment with a single bottle. Quicksilver Quickleen is formulated for...

LIQUI MOLY Motor Oil Saver is a 300 ml oil-circuit additive formulated to restore and soften aged rubber and plastic seals, helping cut oil consumption and external leaks in gasoline and diesel engines. Over time engine seals, valve stem seals and other elastomer components...

Hot Shot's Secret LX4 Lubricity Extreme is a 16 oz fuel additive formulated to restore lubricity to gasoline, ethanol blends and ultra-low sulfur diesel, protecting pumps, injectors and upper cylinders. Modern fuels—especially ultra-low sulfur diesel (ULSD) and high-ethanol gasoline blends—can lack the natural lubricating...

STAR BRITE Star Tron Enzyme Fuel Treatment is a concentrated enzyme-based fuel additive that cleans fuel systems, improves combustibility, and stabilizes up to 128 gallons of gasoline for storage. Designed for marine engines, cars, small equipment and seasonal storage, this 8-ounce concentrate uses a...

ACDelco GM Original Equipment 10-4041 Synthetic Supercharger Oil (4 oz) is a GM OE-spec lubricant formulated to protect supercharger bearings and maintain reliable boost operation in supercharged engines. This compact 4-ounce bottle delivers a concentrated, synthetic-grade fluid designed specifically for supercharged systems. Formulated to...

Bar's Leaks 1415 Transmission Fix is a synthetic‑blend fluid treatment that conditions seals, renews worn transmission components, and helps reduce slipping and harsh shifting in automatic, manual, CVT and DCT drivetrains. Designed as a maintenance and corrective additive, this 11.5‑ounce bottle treats a wide...

Quicksilver Quickare Fuel Treatment is a concentrated 12 oz formula that cleans deposits, stabilizes gasoline and protects both 2‑cycle and 4‑cycle engines from corrosion and ethanol-related issues. Designed for a wide range of gasoline-powered machines—from cars and trucks to motorcycles, lawn equipment and marine...

Doc's Diesel DEF Guard is an 8 oz SCR system conditioner that reduces DEF crystallization, stabilizes stored fluid, and helps keep SCR components running cleaner. DEF Guard is a concentrated additive designed for diesel selective catalytic reduction (SCR) systems to address the hard white...

Maxima 56901 15WT Standard Hydraulic Fork Oil is a one-liter, temperature-stable suspension oil formulated to reduce stiction, prevent foaming and protect fork internals for consistent front-end performance. Designed from high-quality base stocks and advanced additive chemistry, this 15-weight fork oil gives a predictable damping...

Maxima 56916 15WT is a high-quality hydraulic fork oil in a 16 oz bottle designed to deliver stable damping and reduced stiction for motorcycle front suspension. Built from premium base oils and advanced additive chemistry, this 15-weight fork oil aims to keep fork internals...

Lucas Oil Hydraulic Oil Booster and Stop Leak is a 32‑ounce additive that restores hydraulic pressure, conditions seals to stop leaks, and reduces system operating temperature. Lucas Oil developed this economical 1‑quart formula to address common hydraulic issues in aging equipment without immediate disassembly....

Lucas Oil 10866 Anti-Gel is a 64 fl. oz. diesel fuel additive formulated to lower cold filter plugging, keep ULSD and biodiesel flowing, and disperse water in the fuel system during cold weather. When temperatures drop, diesel and biodiesel fuels can thicken, gel or...

Allstar Performance Cotton Candy Fuel Fragrance is a concentrated 4 oz scent additive formulated to blend clear into fuels to give race fuel a cotton-candy aroma without affecting visible clarity. This liquid fragrance is made to mix directly into a variety of race and...

Red Line 60202 Lead Substitute is a 12-ounce fuel additive formulated to protect valve seats in engines built for leaded gasoline while cleaning carburetor deposits and fuel injectors. This concentrated formula is designed for race, marine, and off-road applications where older engines require the...

STA-BIL Diesel All-Season is a 20 oz fuel additive that cleans injectors, boosts cetane, de-emulsifies water, and protects diesel engines down to -40°F. Designed for year-round protection, STA-BIL Diesel All-Season blends detergents, lubricants and anti-gel components to help keep diesel fuel systems running smoothly...

Lucas Oil 11100 Engine Oil Stop Leak is a quart-sized top-off additive that conditions hardened seals and gaskets to reduce oil seepage while helping lower friction and wear. This concentrated engine oil additive blends premium petroleum and synthetic base oils with advanced conditioning agents...

K-100 Gas Treatment with Revitalizer Stabilizer & Octane Booster is a concentrated fuel additive that cleans fuel systems, stabilizes gasoline for storage, and raises octane performance to help engines run more efficiently. This formula targets the common causes of poor engine performance: water contamination,...

SLICK 50 Engine Treatment is a ready-to-use motor oil blend that mixes Slick 50 protection chemistry with a full 10W-30 oil to reduce friction and heat inside engines. Designed as a drop-in maintenance product, this SLICK 50 formulation combines proven friction-fighting additives with the...

CamGuard 100% Oil Additive Concentrate is a concentrated engine oil treatment formulated to reduce wear, corrosion, friction, dry/seal degradation and remove engine deposits. CamGuard is a fully additive-based supplement designed to be mixed into petroleum or synthetic motor oils to deliver multiple targeted protections...

STA-BIL Diesel All-Season Fuel Treatment is a 20 oz concentrated additive that cleans injectors, improves ignition with a cetane boost, de-emulsifies water and protects diesel down to -40°F. Designed for diesel vehicles that face heavy loads, cold climates, or inconsistent fuel quality, this all-season...

zMAX 51-306 Transmission Formula is a concentrated 6 oz micro-lubricant designed to clean varnish, reduce metal wear, and restore smoother shifting in both automatic and manual transmissions. This compact bottle delivers a targeted dose of micro-lubricant that soaks into metal surfaces, conditions seals, and...

104+ Performance Max Octane Boost & Lead Substitute is a concentrated fuel additive that raises octane, reduces engine knock, and supplies a lead-substitute protective blend for vehicles running lower-octane gasoline. If your engine hesitates, pings under load, or your vehicle is tuned for higher-octane...

PJ1 5-20 Foam Air Filter Oil is a super-tacky, water-repellent spray that seals foam filters to trap sand, dirt and abrasive particles while maintaining airflow. Keep high-performance engines running reliably by treating foam intake filters with a purpose-built oil spray. PJ1's 13-ounce aerosol is...

BG CF5 3-in-1 Fuel System Treatment is a professional-grade gasoline additive that cleans injectors, intake valves, and combustion chambers in a single 11 fl oz dose. BG PRODUCTS designed CF5 to tackle common fuel-system contaminants that reduce engine responsiveness and efficiency. This ready-to-use formula...

Lucas Oil 10966 Complete Fuel System Renewal Kit is a four-step, all-in-one service pack that cleans fuel lines, injectors, upper cylinders and protects against corrosion to help restore engine performance. Designed as a complete maintenance set, this kit pairs a concentrated fuel-system cleaner with...

Charunee 4 Pack Catalytic Converter Cleaner is a fuel-additive treatment that helps remove carbon buildup across the fuel and exhaust system to restore performance for gasoline, diesel, hybrid, and flex-fuel vehicles. If your car shows reduced power, hesitation, rough idling, or declining fuel economy,...

STAR BRITE Star Tron Ring Clean Plus is an enzyme-enhanced fuel system cleaner that dissolves and helps prevent deposits in injectors, valves, rings, and combustion chambers to restore power and efficiency. Ring Clean+ combines a modern deposit-control chemistry with a proprietary enzyme package to...

Lucas Oil 16 oz. Diesel Deep Clean is a concentrated fuel additive designed to promote cleaner combustion, reduce particulate matter sent to diesel particulate filters (DPFs), and help lower exhaust backpressure. Designed for preventative maintenance and periodic treatment of diesel engines, Lucas Diesel Deep...

Lucas Oil LUC10011 Power Steering Stop Leak is a solvent-free, seal-renewing formula designed to condition worn power steering seals and reduce leaks while remaining compatible with all power steering fluids. When your steering rack or pump weeps fluid or the steering becomes noisy or...

Hot Shot's Secret FR3 is a 16 oz friction reducer and engine lubricant engineered to lower internal friction, help quiet valvetrain noise, and provide added wear protection for gasoline and diesel engines. FR3 is a concentrated engine treatment formulated to be added to oil...

Lubegard 63010 Platinum Automatic Transmission Fluid Protectant is a 10 oz additive that converts many conventional Dexron/Mercon ATFs to OEM-equivalent, friction‑modified ATF performance while reducing shudder, slip and noise. Designed for professional technicians and DIYers who want dealer-like transmission behavior without stocking multiple factory...

Hot Shot's Secret EDT+ Winter Defense is a concentrated 7-in-1 diesel additive that prevents cold-weather gelling, disperses water, and cleans injectors to keep diesel engines starting and running in extreme cold. Cold weather can thicken diesel, form wax crystals, and trap water in fuel...

Hot Shot's Secret Original Stiction Eliminator Oil Additive is a concentrated 16 oz treatment designed to clean, lubricate and reduce engine wear so your gasoline or diesel motor runs smoother and more reliably. Designed for engines suffering from sticky lifters, sluggish performance or injector...

Marvel Mystery Oil Original Motor Treatment is a versatile fuel and oil additive that cleans deposits and lays a protective lubricating film across engine components. Developed over a century ago, this classic formula works as both a fuel-system cleaner and an oil additive to...

Allstar Performance ALL78131 Bubble Gum fuel fragrance is a concentrated 4 oz scent you add to methanol, nitromethane, gasoline or 2-cycle mixtures to give fuel a clear, long-lasting bubble-gum aroma. Use this resealable 4 oz bottle to scent fuel for hobby engines, RC vehicles,...

Dura Lube Engine Treatment is a concentrated 32 oz formula that bolsters oil performance by reducing friction and protecting internal engine parts for smoother, quieter operation. Designed as an add-in for routine oil changes, Dura Lube Engine Treatment creates a durable lubricating barrier on...

Liqui Moly LM 1005 Oil Leak Stop (300 ml) restores aging rubber and plastic engine seals to reduce leaks and help lower oil consumption. This concentrated additive is formulated to rejuvenate seals and gaskets in engines—shaft seals, valve stem seals and other rubber or...

Star TRON Enzyme Fuel Treatment for Diesel is a concentrated enzyme-based additive that cleans fuel systems, stabilizes diesel up to two years, and helps engines start and run smoother after storage. Star TRON uses proprietary enzyme technology to safely break water and sludge into...

Prime Guard PRIM00203 DEF is a one-gallon ULTRAPURE Diesel Exhaust Fluid formulated for SCR-equipped diesel engines to help control NOx emissions and maintain system performance. This one-gallon container of Prime Guard ULTRAPURE Diesel Exhaust Fluid (DEF) provides a high-purity urea solution designed for Selective...

CRC Guaranteed to Pass Emissions System Cleaner is a 12 oz fuel-additive treatment formulated to clean fuel injectors, intake valves, and combustion chambers to reduce emissions and support smoother engine performance. This concentrated 12 fl oz bottle from CRC is built as a one-treatment...

STA-BIL In-Season Fuel System Treatment & Injector Cleaner is a 32 oz concentrated additive that cleans fuel injectors and the entire fuel system while helping prevent corrosion and improve fuel efficiency. This product restores and protects running engines by removing varnish, gum, and water...

Lucas Oil 10130 Pure Synthetic Oil Stabilizer is a ready-to-use, full-synthetic oil additive formulated to reduce friction, protect engine and drivetrain components, and stabilize oil performance in a wide range of vehicles. This 1-quart treatment blends with synthetic and conventional lubricants to provide a...

Hot Shot's Secret Everyday Diesel Treatment (EDT) is a 16 oz diesel additive formulated to clean injectors, boost cetane, improve lubricity, and protect fuel systems when used regularly. This concentrated EDT bottle is made for drivers who want straightforward, repeatable diesel maintenance. Add at...

Hot Shot's Secret Everyday Diesel Treatment (EDT) is a 16 oz diesel fuel additive formulated to boost cetane, clean injectors, improve lubricity and protect fuel systems when added at every fill-up. Everyday Diesel Treatment (EDT) from Hot Shot's Secret is designed for routine use...

Power Service Diesel Kleen+Cetane Boost is a concentrated diesel fuel treatment that cleans injectors, raises cetane, and adds lubricity to help restore power and improve fuel economy. This 64-ounce bottle from Power Service combines an injector-cleaning formula with a cetane improver and a lubricating...

Lubegard Dr. Tranny Instant Shudder Fixx is a concentrated 2-ounce formula designed to quickly reduce transmission and torque converter shudder in automatic and CVT systems when mixed with the fluid. Built for technicians and DIYers who need a fast, targeted treatment, this two-pack provides...

Hot Shot's Secret Diesel Extreme is a concentrated 16 oz fuel-system treatment designed to clean deposits, shed water, and improve combustion for diesel engines. Formulated for modern diesel vehicles, Diesel Extreme combines active detergents and cumene-based additives to address buildup from injectors, pumps, and...

Lubegard 67010 CVT Recharge & Protect is a 10 fl. oz. CVT-specific additive formulated to restore fluid performance, reduce noise and shudder, and protect belts, chains, pulleys and seals in continuously variable transmissions. Designed for use with all types of continuously variable transmissions (CVTs),...