--- product_id: 711137310 title: "Rislone 4747-12PK Super Concentrated Octane Booster, 6. Fluid_Ounces, 12 Pack, yellow | Real MMT Power Boost, Restores Lost Horsepower, Stops Engine Knocks & Pings, Treats up to 20 Gallons" brand: "bar's leaks" price: "€ 227.02" currency: EUR in_stock: true reviews_count: 5 category: "Bar's Leaks" url: https://www.desertcart.gr/products/711137310-rislone-4747-12pk-super-concentrated-octane-booster-6-fluid-ounces store_origin: GR region: Greece --- # Boosts octane 20+ points Restores lost horsepower Stops engine knock & ping Rislone 4747-12PK Super Concentrated Octane Booster, 6. Fluid_Ounces, 12 Pack, yellow | Real MMT Power Boost, Restores Lost Horsepower, Stops Engine Knocks & Pings, Treats up to 20 Gallons **Brand:** bar's leaks **Price:** € 227.02 **Availability:** ✅ In Stock ## Summary > ⚡ Unleash hidden horsepower and silence engine knocks—because your ride deserves the best! ## Quick Answers - **What is this?** Rislone 4747-12PK Super Concentrated Octane Booster, 6. Fluid_Ounces, 12 Pack, yellow | Real MMT Power Boost, Restores Lost Horsepower, Stops Engine Knocks & Pings, Treats up to 20 Gallons by bar's leaks - **How much does it cost?** € 227.02 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/711137310-rislone-4747-12pk-super-concentrated-octane-booster-6-fluid-ounces) ## Best For - bar's leaks enthusiasts ## Why This Product - Trusted bar's leaks brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Engine Guardian:** Advanced anti-knock formulation eliminates damaging engine knocks and pings caused by low-quality fuel. - • **Safe & Street Legal:** Contains highest legal MMT concentrate without harming catalytic converters or oxygen sensors. - • **Power Surge Guaranteed:** Super concentrated formula boosts octane rating by over 20 points for peak engine performance. - • **Universal Compatibility:** Works seamlessly with all unleaded fuels including E10, E15, E85, and racing fuels—perfect for any ride. - • **Effortless Fuel Treatment:** One 6 fl. oz. bottle treats up to 20 gallons, fitting all gas tanks including capless and obstructed designs. ## Overview Rislone 4747-12PK Super Concentrated Octane Booster is a street-legal, high-performance fuel additive that raises octane by over 20 points, restoring lost horsepower and eliminating engine knock. Compatible with all unleaded fuels and engine types, it safely enhances power and efficiency without harming emissions systems. Each 6 fl. oz. bottle treats up to 20 gallons, making it an essential upgrade for muscle cars, motorcycles, and high-performance engines. ## Description Rislone Hy-per Fuel Super Concentrated Octane Booster increases octane rating to stop engine hesitation and knock & ping, while also increasing power & performance. Street legal formula works equally well on classic muscle cars, newer smaller harder working engines, off road and racing applications. Increased octane allows the engine to run optimum spark timing which not only creates more power, but in many engines reduces emissions and increases fuel mileage. Review: Must have for any motorcycle - I use this religiously in all my harleys to offset lower quality pump gas. Bottle size is perfect fit for my swingarm bag. Usually get 3 to 4 fill ups from a single bottle. Won't ride without it. Review: works right out of the box - they work ## Features - Restores lost horsepower and performance. Antiknock formulation stops engine knock and pings caused by low quality fuel. - Typical results boost octane over 20 points or 2 rating numbers. Contains the highest concentrate of real MMT allowed for street use. - Works with all unleaded gasoline, ethanol E10, E15, E85 and racing fuel. One bottle treats up to 20 gallons of gasoline - Will not harm catalytic converters or oxygen sensors. Use with all fuel injected, direct injected, GTDI & carbureted street, racing, supercharged and turbo engines. - Bottle is designed to work in ALL gas tanks including standard, obstructed and capless (no gas cap) systems. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07FY313PP | | Best Sellers Rank | #184,622 in Automotive ( See Top 100 in Automotive ) #471 in Oil & Fluid Additives | | Brand | Bar's Leaks | | Customer Reviews | 4.6 4.6 out of 5 stars (669) | | Date First Available | 25 August 2020 | | Exterior | Not Specified | | Item Weight | 2.17 Kilograms | | Item model number | 4747-12PK | | Manufacturer | Rislone | | Manufacturer Part Number | 4747-12PK | | Model | 4747-12PK | | Product Dimensions | 17.78 x 15.24 x 25.4 cm; 2.17 kg | ## Images ![Rislone 4747-12PK Super Concentrated Octane Booster, 6. Fluid_Ounces, 12 Pack, yellow | Real MMT Power Boost, Restores Lost Horsepower, Stops Engine Knocks & Pings, Treats up to 20 Gallons - Image 1](https://m.media-amazon.com/images/I/71aSfcAjpML.jpg) ## Questions & Answers **Q: Is this safe for Harley motorcycles with 110 engines?** A: Yes **Q: What is the shelf life on this?** A: The shelf life for this product is 3 years. If you have any other technical questions, feel free to contact our Technical Service Professionals at 800-345-6572 or if you would prefer you can use the contact us page on our website. **Q: Can I use this if I want to run 93 ? Mixing it with 91** A: My Merc needs 93 not available anymore where I live. So I buy by the case and add 1 at every fill of 91. Car fires great and had no issues. **Q: What does this product boost your octane level to?** A: 4to5 percent above pump percent ## Customer Reviews ### ⭐⭐⭐⭐⭐ Must have for any motorcycle *by L***E on 29 June 2024* I use this religiously in all my harleys to offset lower quality pump gas. Bottle size is perfect fit for my swingarm bag. Usually get 3 to 4 fill ups from a single bottle. Won't ride without it. ### ⭐⭐⭐⭐⭐ works right out of the box *by G***Y on 18 July 2026* they work ### ⭐⭐⭐⭐⭐ Save big buck here. *by T***H on 3 August 2026* The item original box was packaged upside down inside of a box with arrow pointing the wrong direction. Some leakage occurred. This is an excellent product. My car calls for 91 octane and this raises my cars regular gas almost there. There are only a couple of gas stations that carry premium grade around my house and they charge at least 1$ more than the regular grade fuel. That saves me about $15. / Tank ## Frequently Bought Together - Rislone 4747-12PK Super Concentrated Octane Booster, 6. Fluid_Ounces, 12 Pack , yellow - Lucas Oil 10003 Fuel Treatment - 1 Quart - Gumout 510013W-6PK Fuel System Cleaner, 6 Pack --- ## 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.gr/products/711137310-rislone-4747-12pk-super-concentrated-octane-booster-6-fluid-ounces](https://www.desertcart.gr/products/711137310-rislone-4747-12pk-super-concentrated-octane-booster-6-fluid-ounces) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-08-27*