--- product_id: 16201439 title: "STP Octane Booster for Gasoline Fuel Additive, Restore Lost Power, 5.25 oz" brand: "stp" price: "€ 18.83" currency: EUR in_stock: true reviews_count: 13 url: https://www.desertcart.sk/products/16201439-stp-octane-booster-for-gasoline-fuel-additive-restore-lost-power store_origin: SK region: Slovakia --- # Restores lost engine power Boosts octane up to 15 gal Cleans fuel intake system STP Octane Booster for Gasoline Fuel Additive, Restore Lost Power, 5.25 oz **Brand:** stp **Price:** € 18.83 **Availability:** ✅ In Stock ## Summary > ⛽ Power up your ride, clean your fuel, and leave the competition behind! ## Quick Answers - **What is this?** STP Octane Booster for Gasoline Fuel Additive, Restore Lost Power, 5.25 oz by stp - **How much does it cost?** € 18.83 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/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 - • **Trusted & Proven:** Top-rated with 4.5 stars and thousands of happy drivers - • **Dual-Action Formula:** Boosts octane while cleaning your fuel system simultaneously - • **Ideal for Regular Use:** One 5.25 oz bottle treats up to 15 gallons of gasoline - • **Effortless Power Boost:** Just pour before refueling—no mixing needed - • **Maximize Engine Performance:** Restores lost horsepower and smooths acceleration ## Overview STP Octane Booster is a premium 2-in-1 fuel additive that increases octane levels and cleans your fuel intake system to restore engine power. Easy to use with no mixing required, one 5.25 oz bottle treats up to 15 gallons of gasoline, making it perfect for regular maintenance. Highly rated and trusted by thousands, it’s a must-have for drivers seeking peak performance and efficiency. ## 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. Review: Great way to save a dollar a gallon - Used to have a high octane fuel only vehicle and so does my father and adding half a bottle to the tank and filling up with regular gas neither of us have had any issues ever with this octane booster. Price of high octane is usually around a $1 more a gallon so using this has saved a lot of money Review: This will NOT increase hp, torque, or speed - Do not buy this if you are thinking it will improve your vehicle's performance in some way. I made that mistake of ignorance myself when first grabbing a bottle off the gas station shelf. It likely won't hurt your engine to use one bottle per 15 gallons (they say up to 20), but it's just not what most people think it is/does. **edit*- this DID cause transmission damage, knocks, and pings on my naturally aspirated system. I mistakenly thought that my variable octane (87-93) engine and drive train could handle this change in octane. This was my mistake, I was wrong, and this shouldn't be used on a naturally aspirated engine unless the gas has been sitting for ~6 months and has gone stale. Check with your dealer about your specific vehicle make & model.* Octane boosters raise the octane level of your fuel, making it MORE difficult for gasoline to combust under pressure. They get a bad rap as they're sold as performance enhancers, or speed boosters. High-revving, high psi turbo/supercharged engines can benefit from this as it leads to increased efficiency of combustion. High-octane fuel requiring performance cars that only have access to 87 octane gas stations, or fuel that's been sitting around a few months or more can benefit from this too. You can do some research yourself, but if your vehicle does not specifically recommend using an octane booster or a fuel with octane higher than 91 or 93, then it's likely not for you. Maybe if you only have access to low octane gas, but this is an expensive way to boost it by only a little. You're way better off using 93, or 91 octane as your car will take. Using with regular gas if your car takes regular 87 octane gas will do nothing. I use it in a naturally aspirated 3.8L V6 with 104k miles and it was what was causing me knocks around 3rd gear. Typically a fuel system cleaner (and this part is important!) which SPECIFICALLY lists the detergent levels, not just the name of the chemical the detergent used, is a better bet for increasing performance, but still only by a few hp in the best of scenarios on the oldest of cars in the worst of shape over a long time after a lot of uses, and typically is only around up to 0.5hp. This one doesn't even list the detergent I don't think, just that it has 'jet fuel' whatever tf that actually is. It's not fuel for a jet, that's for sure (kerosine is what jet fuel actually is). There are way way better options for boosting performance, and I'm not sure how this would handle in a system that can't take varying levels of octane. Snake oil for many, but it does have it's uses and works for some very specific cases and again, it does not make sense to me yet why. I have some unknown issue, in a 3-year-old car with a ton of miles for the years, which can take variable octane fuels. I likely have some hairline crack in my fuel system somewhere leaking vapor or letting moisture in. **edit*- it was this octane booster which was contributing to my tranmission knocking issue. After stopping use and going down in fuel grade for a month, it's running like new again.* ## 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 | #18,782 in Automotive ( See Top 100 in Automotive ) #5 in Octane Boosters | | Brand | STP | | Customer Reviews | 4.5 4.5 out of 5 stars (1,424) | | Date First Available | February 4, 2011 | | Exterior | [[Not Applicable]] | | Item Weight | 4.9 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 - 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 - Image 2](https://m.media-amazon.com/images/I/71rfCBIIrAL.jpg) ![STP Octane Booster for Gasoline Fuel Additive, Restore Lost Power, 5.25 oz - Image 3](https://m.media-amazon.com/images/I/71DvbszoSQL.jpg) ![STP Octane Booster for Gasoline Fuel Additive, Restore Lost Power, 5.25 oz - Image 4](https://m.media-amazon.com/images/I/714WqReJyyL.jpg) ![STP Octane Booster for Gasoline Fuel Additive, Restore Lost Power, 5.25 oz - 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. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great way to save a dollar a gallon *by B***Z on April 30, 2026* Used to have a high octane fuel only vehicle and so does my father and adding half a bottle to the tank and filling up with regular gas neither of us have had any issues ever with this octane booster. Price of high octane is usually around a $1 more a gallon so using this has saved a lot of money ### ⭐⭐⭐⭐⭐ This will NOT increase hp, torque, or speed *by S***N on December 26, 2022* Do not buy this if you are thinking it will improve your vehicle's performance in some way. I made that mistake of ignorance myself when first grabbing a bottle off the gas station shelf. It likely won't hurt your engine to use one bottle per 15 gallons (they say up to 20), but it's just not what most people think it is/does. **edit*- this DID cause transmission damage, knocks, and pings on my naturally aspirated system. I mistakenly thought that my variable octane (87-93) engine and drive train could handle this change in octane. This was my mistake, I was wrong, and this shouldn't be used on a naturally aspirated engine unless the gas has been sitting for ~6 months and has gone stale. Check with your dealer about your specific vehicle make & model.* Octane boosters raise the octane level of your fuel, making it MORE difficult for gasoline to combust under pressure. They get a bad rap as they're sold as performance enhancers, or speed boosters. High-revving, high psi turbo/supercharged engines can benefit from this as it leads to increased efficiency of combustion. High-octane fuel requiring performance cars that only have access to 87 octane gas stations, or fuel that's been sitting around a few months or more can benefit from this too. You can do some research yourself, but if your vehicle does not specifically recommend using an octane booster or a fuel with octane higher than 91 or 93, then it's likely not for you. Maybe if you only have access to low octane gas, but this is an expensive way to boost it by only a little. You're way better off using 93, or 91 octane as your car will take. Using with regular gas if your car takes regular 87 octane gas will do nothing. I use it in a naturally aspirated 3.8L V6 with 104k miles and it was what was causing me knocks around 3rd gear. Typically a fuel system cleaner (and this part is important!) which SPECIFICALLY lists the detergent levels, not just the name of the chemical the detergent used, is a better bet for increasing performance, but still only by a few hp in the best of scenarios on the oldest of cars in the worst of shape over a long time after a lot of uses, and typically is only around up to 0.5hp. This one doesn't even list the detergent I don't think, just that it has 'jet fuel' whatever tf that actually is. It's not fuel for a jet, that's for sure (kerosine is what jet fuel actually is). There are way way better options for boosting performance, and I'm not sure how this would handle in a system that can't take varying levels of octane. Snake oil for many, but it does have it's uses and works for some very specific cases and again, it does not make sense to me yet why. I have some unknown issue, in a 3-year-old car with a ton of miles for the years, which can take variable octane fuels. I likely have some hairline crack in my fuel system somewhere leaking vapor or letting moisture in. **edit*- it was this octane booster which was contributing to my tranmission knocking issue. After stopping use and going down in fuel grade for a month, it's running like new again.* ### ⭐⭐⭐⭐ Works well and improves gas milage *by V***. on March 1, 2023* I get about 40 miles more on a tank on my Volkswagen EOS 2007, so it more than pays for itself each tank. ## 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.sk/products/16201439-stp-octane-booster-for-gasoline-fuel-additive-restore-lost-power](https://www.desertcart.sk/products/16201439-stp-octane-booster-for-gasoline-fuel-additive-restore-lost-power) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-10-12*