stp.com

# STP

> STP is a leading American automotive chemicals brand specializing in engine protection, fuel additives, oil treatments, and vehicle maintenance products. Products span fuel additives, oil and engine additives, functional fluids, and car care solutions. STP's racing heritage includes sponsorship of Richard Petty and Legacy Motor Club.

## Fuel Additives

- [STP Ultra 5-In-1 Fuel System Cleaner](https://stp.com/product/ultra-5-in-1-fuel-system-cleaner/): Contains 3 times the amount of cleaning agents vs the leading premium gasoline. Uses a proprietary blend of PEA and PIBA detergents to help remove harmful deposits and fight engine friction. Helps save gas by keeping fuel intake system clean. Advanced synthetic technology. Compatible with turbo, direct inject, and hybrid engines including cap-less gas systems. Treats up to 26 gallons. Use every oil change or 4,000 miles.

- [STP Complete Fuel System Cleaner](https://stp.com/product/complete-fuel-system-cleaner/): Deep cleans the entire fuel system. Contains 2 times the amount of cleaning agents vs the leading premium gasoline. Helps restore performance. Helps save gas. Removes deposits. Proprietary blend of PEA and PIBA detergents. Compatible with any gasoline engine including turbo, direct inject, and hybrid. Use every 4,000 miles.

- [STP Super Concentrated Fuel Injector Cleaner](https://stp.com/product/super-concentrated-fuel-injector-cleaner/): Unclogs dirty fuel injectors, removes deposits, and restores performance. Save gas by cleaning dirty fuel injectors. Helps prevent hard starts, lost acceleration, and rough idling. Compatible with any gasoline engine including cap-less gas systems. Available in 5.25 fl oz (up to 15 gal) and 12 fl oz (up to 21 gal).

- [STP Gas Treatment](https://stp.com/product/gas-treatment/): Improves the quality of gas by adding powerful cleaning agents that help fight the accumulation of harmful deposits in the fuel system that can reduce performance. Also engineered to remove water, which can lead to fuel line freeze. Keeps fuel injectors and intake valves clean. Fights against carbon, gum and varnish deposits.

- [STP Octane Booster](https://stp.com/product/octane-booster/): Two-in-one formula boosts octane and cleans the fuel intake system to restore lost performance. Contains MMT + Synthetic Technology. Restores lost power & acceleration. Reduces knocking and pinging. Addresses Octane Requirement Increase by removing combustion chamber deposits.

- [STP 1 Tank Tune Up](https://stp.com/product/stp-1-tank-tune-up/): Reduce up to 50% of hydrocarbon emissions. Cleans oxygen sensors to help prevent failure and malfunction. Deep cleans fuel injectors, cleans intake valves, and removes deposits from cylinder head and piston tops. 12 oz treats 21-gallon tank. Use 4 times per year for maintenance or as needed for emissions failure, rough running, knocking, hard starts, or poor economy.

- [STP GDI Intake Valve Cleaner](https://stp.com/product/stp-gdi-intake-valve-cleaner/): Improves fuel efficiency, increases horsepower, improves acceleration, and reduces rough idle. Contains concentrated P.E.A detergents that remove hardened carbon deposits. Features a flexible hose for hard-to-reach areas without engine teardown. Compatible with GDI, PFI, and turbo gasoline engines. Use every 10,000 miles.

- [STP Fuel, Exhaust & Emissions System Cleaner](https://stp.com/product/stp-fuel-exhaust-emissions-system-cleaner/): Helps turn off check engine light & pass emissions test. Cleans dirty oxygen sensors to help prevent failure & malfunction. Protects & maintains catalytic converter. Helps save gas with cleaner engine. Extends engine life. Safe for gasoline, hybrid & diesel cars & trucks. Use before emissions testing, when check engine light is on, or every 3,000 miles for maintenance.

- [STP High Mileage Complete Fuel System Cleaner](https://stp.com/product/high-mileage-complete-fuel-system-cleaner/): Deep cleans the entire fuel system for vehicles over 75,000 miles. Contains two times the amount of cleaning agents vs the leading premium gasoline. Proprietary blend of PEA and PIBA detergents. Helps restore performance. Helps save gas. Lowers emissions.

- [STP Fuel System Cleaner for Ethanol](https://stp.com/product/fuel-system-cleaner-for-ethanol/): Ethanol fuels can leave deposits on intake valves and fuel injectors that reduce fuel economy. Rust and corrosion may also form and damage fuel system components. Inhibits corrosion, restores performance, and saves gas. Compatible with E10, E15, and E85 blended gasolines.

- [STP All Season Water Remover](https://stp.com/product/all-season-water-remover/): Fights fuel line freeze no matter what time of year it is. A concentrated fuel treatment that helps maintain optimum performance all year round. Works to fight rust and corrosion while removing condensation in warm weather and helps prevent fuel line freeze. May be combined with other STP fuel additives.

- [STP Diesel Fuel Injector Treatment](https://stp.com/product/diesel-fuel-injector-treatment/): Prevents fuel line freeze, removes deposits, saves gas, fights injector & pump wear, and prevents corrosion. Contains no alcohol. Treats up to 35 gallons. Use regularly when filling up.

- [STP High Mileage Fuel Injector Carburetor Treatment](https://stp.com/product/high-mileage-fuel-injector-carburetor-treatment/): Fights deposit buildup and helps keep fuel injectors and carburetors clean in vehicles with over 75,000 miles. Without cleaning, deposits can lead to hard starts, lost acceleration and rough idling. Available in 5.25 fl oz and 12 fl oz sizes.

- [STP Fuel, Exhaust & Emissions System Cleaner](https://stp.com/product/stp-fuel-exhaust-emissions-system-cleaner/): STP Fuel, Exhaust & Emissions Cleaner removes carbon/soot, cleans O2 sensors, protects the catalytic converter, and boosts efficiency and engine life (gasoline engines only).

- [STP GDI Intake Valve Cleaner](https://stp.com/product/stp-gdi-intake-valve-cleaner/): STP GDI Intake Valve Cleaner removes carbon buildup, boosts fuel efficiency, power, and acceleration, reduces rough idle, and extends engine life for gasoline engines.

## Oil & Engine Additives

- [STP Oil Treatment](https://stp.com/product/oil-treatment/): Fights friction to help protect against engine wear by providing a thicker cushion between moving engine parts. Contains zinc anti-wear agent ZDDP. Reduces oil burning. Lubricates moving engine parts. Improves oil performance. Add to 4–5 quarts of oil at or between oil changes.

- [STP High Mileage Oil Treatment + Stop Leak](https://stp.com/product/high-mileage-oil-treatment-stop-leak/): Rejuvenates seals and gaskets. Contains zinc anti-wear agent ZDDP. Helps stop engine leaks, noise and smoking. Improves oil performance. High-viscosity formula for vehicles with over 75,000 miles / 120,000 km.

- [STP Synthetic Oil Treatment](https://stp.com/product/synthetic-oil-treatment/): Synthetic based formula provides superior protection for today's longer drain intervals. Combats engine deposits. Helps enhance oil durability. Helps protect against engine wear. Fights metal-to-metal friction by providing a thicker cushion of oil between moving engine parts. Reformulated for low-viscosity oils.

- [STP Synthetic Engine Flush](https://stp.com/product/synthetic-engine-flush/): Scientifically engineered to deep clean the engine for a better oil change. Dissolves engine deposits. Removes accumulated sludge. Compatible with conventional and synthetic motor oil and gasoline, diesel, and turbocharged engines including low-viscosity oils. Add to old engine oil; idle 5–15 minutes — do NOT drive; drain and replace oil and filter.

- [STP Super Concentrated High Mileage Engine Flush](https://stp.com/product/super-concentrated-high-mileage-engine-flush/): Scientifically engineered to improve the oil drain for vehicles over 75K miles. Super concentrated cleaning agents. Reduces sludge and varnish on cylinder heads. Safe for conventional and synthetic motor oils. Will not harm seals. Safe to use with every oil change.

- [STP Stop Leak + Stop Smoke Engine Repair](https://stp.com/product/stop-leak-stop-smoke-engine-repair/): Stops motor oil leaks & oil burning. Repairs & reconditions seals & gaskets that can shrink, dry out & crack. Reduces exhaust smoking caused by burning in the combustion chamber. Reconditions & protects transmission seals. Reduces emissions. Non-clogging formula with nothing harmful to engines.

## Functional Fluids

- [STP High Mileage Transmission Fix + Conditioner](https://stp.com/product/high-mileage-transmission-fix-conditioner/): Replaces the need for two separate transmission fix products, saving you time and money. Helps eliminate slip. Reduces noise and shudder. Stops leaks and hard shifting. Extends transmission life. Controls overheating. Safe for manual, automatic, and CVT transmissions. Treats up to 9 quarts.

- [STP Synthetic Brake Fluid — DOT 4](https://stp.com/product/synthetic-brake-fluid-dot-4/): Increases dry boiling point to ensure maximum life and reliable braking power. Provides protection against brake failure from vapor lock. Helps prevent corrosion in brake system. Exceeds federal motor vehicle safety standard No. 116. Meets SAE spec. J1704. Compatible with DOT 3 and DOT 4 ABS disc or drum brakes.

- [STP Heavy Duty Brake Fluid — DOT 3](https://stp.com/product/heavy-duty-brake-fluid-dot-3/): Helps protect against brake failure from vapor lock. Prevents corrosion in brake system. Works with all brake systems requiring DOT 3 fluids. Exceeds Federal Motor Vehicle Safety Standard No. 116. Meets SAE spec. J1703.

- [STP Power Steering Fluid](https://stp.com/product/power-steering-fluid/): Protects against wear and pump breakdown caused by abnormal wear, oxidation, and foaming. Performs even in sub-zero temperatures. Year-round protection.

- [STP High Mileage Power Steering Fluid & Stop Leak](https://stp.com/product/high-mileage-power-steering-fluid-stop-leak/): Revitalizes dried, hardened, and shrunken seals with a special conditioner. Helps protect against wear and pump breakdown. Specially formulated for vehicles over 75,000 miles to stop or reduce fluid loss caused by seals that leak due to wear or shrinkage — not for use with broken or scored seals. Compatible with all approved power steering fluids.

## Maintenance & Car Care

- [STP Tire Fix](https://stp.com/product/tire-fix/): Instantly seals and inflates. Seals punctures up to ¼" wide. Holds air for at least 3 days. Non-flammable formula. Tire sensor safe. Universal hose included. Temporary solution — drive slowly to the nearest facility for inspection and permanent repair after use.

- [Son Of A Gun! Protectant](https://stp.com/product/son-of-a-gun-protectant/): Restores luster, leaving a deep, glossy shine. Reduces ultraviolet light that can cause fading and cracking. Usable on vinyl and your car's dashboard. Protects against abrasion. Not for use on paint, canvas, fabric, clear plastic, plexiglass, glass, woven materials, or motorcycle tires.

- [Son Of A Gun! One Step Tire Care](https://stp.com/product/son-of-a-gun-one-step-tire-care/): Dissolves dirt and grime. Restores luster and leaves a rich, satiny finish. Penetrates and bonds to surface to protect against cracking and discoloration. Triple-action foam formula — cleans, shines, and protects — no wiping required. Use only on sidewalls, not treads.

## Maintenance Guides

- [Motor Oil — How to Change Your Oil](https://stp.com/motor-oil/): Covers four oil types — synthetic (super lubrication, withstands extreme heat, extends oil change intervals), synthetic blend, high mileage, and conventional — and a 9-step oil change procedure including running the engine 5 minutes before draining, using a 4–5 litre drain pan, removing the filter cap to speed draining, lubricating the new filter seal, and checking for leaks after running.

- [Fuel System & Fuel Additives](https://stp.com/fuel-system-fuel-additives/): Explains how deposits accumulate on intake valves, pistons, and combustion chambers and how PEA and PIBA detergent additives clean the fuel system. Covers Octane Requirement Increase (ORI) and how removing combustion chamber deposits addresses it.

- [Oil Additives Guide](https://stp.com/oil-additives/): Explains seven additive types — ZDDP (helps reduce friction, heat and wear, particularly valuable for older vehicles), ceramic (uses silicon dioxide technology, protection up to 15k miles), viscosity index improvers, corrosion inhibitors (protect from water and acids formed from combustion gases), detergents (keep contaminant particles suspended in the oil so they can be removed by the filter), stop-leak, and smoke treatment (reduce oil burning and exhaust smoke).

- [Brake System — Check Brake Fluid & Lubricate Chassis Joints](https://stp.com/brake-system/): Step-by-step guide to checking brake fluid level and lubricating chassis joints. Pro tip: brake fluid will dissolve paint, so be sure not to spill it on any painted surface. If you have a spill, flush the spill with water ASAP.

- [Seasonal Maintenance — How to Recharge Your A/C](https://stp.com/seasonal-maintenance/): 8-step A/C recharge guide. Also covers tire types, battery care, fuel stabilization, and windshield maintenance. Key advice: fuel can begin to oxidise and go stale in as little as three weeks.

- [Transmission — Check Auto & Manual Transmission Fluid](https://stp.com/transmission/): Step-by-step guide to checking automatic and manual transmission fluid levels. Transmission fluid levels should be checked at every oil change. If the level is low, your transmission has a leak, as the fluid isn't consumed during operation.

- [Power-Steering System — How to Check Power Steering Fluid](https://stp.com/power-steering-system/): 4-step guide to checking and topping up power steering fluid. Oxidized power steering fluid should be changed periodically at manufacturer-recommended intervals.

- [Tires — How to Check Tire Pressure and Tread Depth](https://stp.com/tires/): Guide to checking tire pressure and reading five tire wear patterns — excessive outer wear, excessive center wear, feathering, cupping, and inadequate tread depth. Underinflated tires cut fuel economy by as much as 2% for each missing pound of pressure. Tread depth should be greater than 4/32". Rotate tires at every oil change or every six months.

- [Gas-Saving Tips](https://stp.com/gas-saving-tips/): Five tips: (1) underinflated tires cut fuel economy by as much as 2% for each missing pound of pressure; (2) deposits can decrease your fuel efficiency by as much as 11 percent, and deposits form as early as 1,500 miles; (3) avoid carrying excessive items or weight in the vehicle; (4) the faster you drive, the more the aerodynamic drag increases — remove unused racks and carriers; (5) STP Fuel Additives are formulated to maximize fuel efficiency and save gas by keeping the fuel intake system clean.

- [Cooling System — How to Check Coolant Level](https://stp.com/cooling-system/): Guide to checking coolant level and inspecting radiator cap, belts, hoses, and water pump. Opening the radiator cap on a warm or hot engine can cause severe burns. Engine designed to run between 180–230°F. Complete flush and coolant replacement every two years.

- [Fuel & Oil Additives Guide](https://stp.com/fuel-additives-guide/): Overview of STP fuel and oil additive products organized by function — Performance & Maintenance System Cleaners and Oil Additives. References Anti-Friction Technology™ and protection up to 15,000 miles.

## Problem Solver

- [Knock & Ping](https://stp.com/problem-solver/knock-ping/): Knocking and pinging due to auto-ignition could be a result of combustion chamber deposits. Recommended solution: STP Octane Booster.

- [Reduced Fuel Economy](https://stp.com/problem-solver/reduced-fuel-economy/): These deposits will make your engine work harder to get fuel, which will in turn hurt performance and gas mileage. Recommended solutions: STP Complete Fuel System Cleaner, Gas Treatment, Super Concentrated Fuel Injector Cleaner, and Ultra 5-In-1 Fuel System Cleaner.

- [Lost Performance & Power](https://stp.com/problem-solver/lost-performance-and-power/): Fuel system deposits that reduce performance and power — recommended fuel system cleaner solutions.

- [High-Mileage Vehicle Maintenance](https://stp.com/problem-solver/high-mileage-vehicle-maintenance/): Maintenance guidance and product recommendations for vehicles over 75,000 miles.

- [Lost Power Steering](https://stp.com/problem-solver/lost-power-steering/): Power steering fluid issues and product recommendations for restoring power steering performance.

- [Fluid Leaks](https://stp.com/problem-solver/fluid-leaks/): Engine oil, transmission, and power steering fluid leak diagnosis and stop-leak product recommendations.

- [Stale Gas](https://stp.com/problem-solver/stale-gas/): Fuel can begin to oxidise and go stale in as little as three weeks. Guidance on fuel stabilization and gas treatment solutions.

- [Excessive Engine Friction](https://stp.com/problem-solver/excessive-engine-friction/): Engine friction causes wear and reduces oil performance — oil treatment and ZDDP additive recommendations.

- [Excessive Oil Burning](https://stp.com/problem-solver/excessive-oil-burning/): Oil burning in the combustion chamber causes exhaust smoke — stop leak and stop smoke product recommendations.

- [Exhaust Emissions and Smoke](https://stp.com/problem-solver/exhaust-emissions-and-smoke/): Excessive exhaust emissions and smoke — emissions cleaner and oxygen sensor cleaning product recommendations.

- [Tough Starts](https://stp.com/problem-solver/tough-starts/): Hard start issues caused by dirty fuel injectors or deposit buildup — fuel system cleaner recommendations.

## Product Finder & FAQs

- [Product Advisor](https://stp.com/product-advisor/): Interactive product finder tool — helps identify the right STP product based on vehicle type and problem.

- [Maintenance Advice FAQs](https://stp.com/maintenance-advice/faqs/): FAQs covering brake and power steering fluid, fuel additives, oil additives, and general STP product questions.

## About STP

- [STP Racing Heritage — Richard Petty](https://stp.com/about-us/racing/richard-petty/): STP's history with Richard Petty and NASCAR racing sponsorship.

- [Legacy Motor Club](https://stp.com/about-us/racing/legacy-motor-club/): STP's current NASCAR racing sponsorship with Legacy Motor Club.

- [STP History](https://stp.com/about-us/stp-history/): Brand history and milestones for STP from its founding to present day.

- [STP Videos](https://stp.com/about-us/videos/): Video content including product demonstrations and maintenance guides.

## Optional

- [Product Categories — Engine & Fuel Systems](https://stp.com/products/engine-fuel-systems/): All STP engine and fuel system products — fuel additives, oil and engine additives, and motor oil.

- [Product Categories — Fuel Additives](https://stp.com/products/engine-fuel-systems/fuel-additives/): Full range of STP fuel additive products including system cleaners, injector cleaners, octane boosters, and water removers.

- [Product Categories — Oil & Engine Additives](https://stp.com/products/engine-fuel-systems/oil-engine-additives/): Full range of STP oil treatment, engine flush, and stop-leak products.

- [Product Categories — Functional Fluids](https://stp.com/products/functional-fluids/): All STP functional fluid products — brake fluid, power steering fluid, and transmission products.

- [Product Categories — Maintenance & Other](https://stp.com/products/maintenance-other/): STP maintenance products including STP Pro Series, Son of a Gun!, Tire Fix, degreaser triggers & wipes, and lawn & garden products.