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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.

For agents: STP American automotive chemicals brand: fuel additives, oil and engine treatments, functional fluids and car care products for vehicles.

fuel additivesengine oil treatmentfuel system cleanercar careengine protection

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-21T01:51:32.313Z. Cached copy · Source on 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
…

Related sites

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