--- product_id: 16201439 title: "STP Octane Booster for Gasoline Fuel Additive, Restore Lost Power, 5.25 oz | Fuel cleaner for gasoline engines; 5.25 oz bottle treats up to 15 gallons, compatible with cap-less systems" brand: "stp" price: "€ 10.53" currency: EUR in_stock: true category: "Stp" url: https://www.desertcart.hr/products/16201439-stp-octane-booster-for-gasoline-fuel-additive-restore-lost-power store_origin: HR region: Croatia --- # Boosts octane up to +15 points Treats up to 15 gallons per bottle Cleans fuel system for smoother engine STP Octane Booster for Gasoline Fuel Additive, Restore Lost Power, 5.25 oz | Fuel cleaner for gasoline engines; 5.25 oz bottle treats up to 15 gallons, compatible with cap-less systems **Brand:** stp **Price:** € 10.53 **Availability:** ✅ In Stock ## Summary > ⛽ Elevate your drive—because your engine deserves the premium treatment! ## Quick Answers - **What is this?** STP Octane Booster for Gasoline Fuel Additive, Restore Lost Power, 5.25 oz | Fuel cleaner for gasoline engines; 5.25 oz bottle treats up to 15 gallons, compatible with cap-less systems by stp - **How much does it cost?** € 10.53 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/16201439-stp-octane-booster-for-gasoline-fuel-additive-restore-lost-power) ## Best For - stp enthusiasts ## Why This Product - Trusted stp brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Fuel System Detox:** High-performance detergents clean and protect your fuel injectors and intake valves. - • **Advanced Octane Boost:** Reduce engine knock and ping for a smoother, quieter ride. - • **Universal Compatibility:** Works seamlessly with all gasoline engines, including cap-less systems. - • **Power Restore in Every Drop:** Revive lost acceleration and engine responsiveness with every fill-up. - • **Effortless Use, Maximum Impact:** Just pour before refueling—no mixing needed, perfect for busy pros on the go. ## Overview STP Octane Booster is a 5.25 oz fuel additive designed to enhance gasoline engine performance by boosting octane levels, cleaning the fuel system, and reducing engine knock. Compatible with all gasoline engines including cap-less systems, one bottle treats up to 15 gallons, improving acceleration, fuel efficiency, and overall engine smoothness. ## Description Give your engine the boost it needs with STP Octane Booster for Gasoline. This gasoline fuel additive features MMT + Synthetic Technology to boost octane and clean the fuel intake system, helping restore lost power and acceleration. Use it as a gasoline fuel treatment during car maintenance before road trips or long-distance driving. Compatible with cars, trucks, SUVs, and all gasoline engines, including cap-less gas systems, STP Octane Booster raises octane levels to reduce knocking and pinging caused by combustion chamber deposits. This fuel system cleaner helps improve fuel flow and combustion efficiency for smoother acceleration and increased horsepower. Drivers and car owners can keep it in the garage or add it at the gas station as part of their routine. Made with jet fuel, a high-quality carrier of active ingredients, STP Octane Booster helps improve MPG by optimizing fuel use and reducing engine strain. One 5.25 fl oz bottle treats up to 15 gallons of gasoline. ## Features - Restores Performance & Treats Fuel System: This STP gas treatment works as an effective gas treatment poured directly into your gas tank to help restore lost power and acceleration during regular fill-ups - For Gasoline Engine Compatibility:This advanced fuel additive for gasoline engines is suitable for use in cars & trucks, helping support reliable engine performance - Cleans and Protects Fuel System: This fuel treatment includes high-performance detergents that help keep the fuel system clean while supporting efficient combustion - Boosts Octane and Reduces Knock: Formulated to deliver an octane boost, this additive helps reduce engine knock and ping when added to your fuel tank, promoting smoother operation - Versatile Gas Additive Solution: This gas additive helps improve MPG and restore engine performance by enhancing fuel quality and combustion efficiency - Easy to Use – No Mixing Required: Simply pour the entire bottle into your fuel tank before refueling; one bottle treats up to 15 gallons and is ideal for regular use ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B004MBFTYK | | Best Sellers Rank | #8,367 in Automotive ( See Top 100 in Automotive ) #3 in Octane Boosters | | Brand | STP | | Customer Reviews | 4.5 4.5 out of 5 stars (1,395) | | Date First Available | February 4, 2011 | | Exterior | [[Not Applicable]] | | Is Discontinued By Manufacturer | No | | Item Weight | 5.5 ounces | | Item model number | 78574 | | Manufacturer | STP | | Manufacturer Part Number | 78574 | | Model | 78574 | | Position | Outside | | Product Dimensions | 1.5 x 2.3 x 8 inches | | Voltage | 12 Volts | ## Images ![STP Octane Booster for Gasoline Fuel Additive, Restore Lost Power, 5.25 oz | Fuel cleaner for gasoline engines; 5.25 oz bottle treats up to 15 gallons, compatible with cap-less systems - Image 1](https://m.media-amazon.com/images/I/71tf-sf7ZzL.jpg) ![STP Octane Booster for Gasoline Fuel Additive, Restore Lost Power, 5.25 oz | Fuel cleaner for gasoline engines; 5.25 oz bottle treats up to 15 gallons, compatible with cap-less systems - Image 2](https://m.media-amazon.com/images/I/71rfCBIIrAL.jpg) ![STP Octane Booster for Gasoline Fuel Additive, Restore Lost Power, 5.25 oz | Fuel cleaner for gasoline engines; 5.25 oz bottle treats up to 15 gallons, compatible with cap-less systems - Image 3](https://m.media-amazon.com/images/I/71DvbszoSQL.jpg) ![STP Octane Booster for Gasoline Fuel Additive, Restore Lost Power, 5.25 oz | Fuel cleaner for gasoline engines; 5.25 oz bottle treats up to 15 gallons, compatible with cap-less systems - Image 4](https://m.media-amazon.com/images/I/714WqReJyyL.jpg) ![STP Octane Booster for Gasoline Fuel Additive, Restore Lost Power, 5.25 oz | Fuel cleaner for gasoline engines; 5.25 oz bottle treats up to 15 gallons, compatible with cap-less systems - Image 5](https://m.media-amazon.com/images/I/71aGj0z0ntL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: How many gallons does it treat?** A: The front of the container states "Treats up to 21 gallons" -- my husband uses this product in our 1965 Mustang, which has a tank size of 16 gallons. Depending on how often he drives the car and fills the gas tank, he uses 1 bottle with each fill up. I hope this answers some of your question. **Q: does this work on a 2 stroke?** A: Does your 2 stroke recommend a higher octane - 89+ and you can't get the fuel? if so, use it **Q: Is this safe for use with catalytic converters?** A: I am using it in a 66 Mustang and a 73 Z28 neither have converters, so not sure **Q: Will this stuff boost 93 octane to 95?** A: Yes, I think it is a gain of just under 2.5 octane numbers when added to 12 or 14 gallons. ## Frequently Bought Together - STP Octane Booster for Gasoline Fuel Additive, 5.25 oz, Fuel Additive That Raises Octane Levels and Cleans the Fuel Intake System to Restore Lost Power and Acceleration, Help Improve MPG - STP Ultra 5 In 1 Fuel System Cleaner and Stabilizer, Deep Cleans Fuel System and Fights Engine Friction, 12 FlOz - STP Complete Fuel System Cleaner, Fuel Cleaner Deep Cleans Entire Fuel System, 5.25 Oz, Multicoloured, 1 Count (Pack of 1) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/16201439-stp-octane-booster-for-gasoline-fuel-additive-restore-lost-power](https://www.desertcart.hr/products/16201439-stp-octane-booster-for-gasoline-fuel-additive-restore-lost-power) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-08*