--- product_id: 711137310 title: "Rislone 4747-12PK Super Concentrated Octane Booster, 6. Fluid_Ounces, 12 Pack, yellow" brand: "bar's leaks" price: "€ 196.80" currency: EUR in_stock: true reviews_count: 5 category: "Bar's Leaks" url: https://www.desertcart.hr/products/711137310-rislone-4747-12pk-super-concentrated-octane-booster-6-fluid-ounces store_origin: HR region: Croatia --- # Boosts octane by 20+ points Treats up to 20 gallons per bottle Safe for catalytic converters & sensors Rislone 4747-12PK Super Concentrated Octane Booster, 6. Fluid_Ounces, 12 Pack, yellow **Brand:** bar's leaks **Price:** € 196.80 **Availability:** ✅ In Stock ## Summary > ⚡ Ignite your drive with every fill-up! ## Quick Answers - **What is this?** Rislone 4747-12PK Super Concentrated Octane Booster, 6. Fluid_Ounces, 12 Pack, yellow by bar's leaks - **How much does it cost?** € 196.80 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/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 - • **Universal Tank Fit:** Works seamlessly with standard, clogged, and capless gas tanks. - • **High-Octane Confidence:** Contains max legal MMT concentrate for street use without damage. - • **Engine Guardian Formula:** Anti-shock action stops engine bumps and pings from low-quality fuel. - • **Fuel Flexibility Master:** Compatible with unleaded, E10, E15, E85, and racing fuels. - • **Power Surge in Every Drop:** Restore lost engine power and performance instantly. ## Overview Rislone 4747-12PK Octane Booster Concentrate is a powerful fuel additive that increases octane by over 20 points, enhancing engine performance and preventing knocking. Safe for all gasoline types including ethanol blends and racing fuels, it protects catalytic converters and oxygen sensors while fitting all gas tank designs. Each bottle treats up to 20 gallons, making it a must-have for drivers seeking peak engine efficiency and reliability. ## 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 Review: Actually Works! ## 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 | #162,091 in Automotive ( See Top 100 in Automotive ) #432 in Oil & Fluid Additives | | Brand | Bar's Leaks | | Customer Reviews | 4.6 4.6 out of 5 stars (661) | | 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 - Image 1](https://m.media-amazon.com/images/I/71aSfcAjpML.jpg) ![Rislone 4747-12PK Super Concentrated Octane Booster, 6. Fluid_Ounces, 12 Pack, yellow - Image 2](https://m.media-amazon.com/images/I/61+myuXzbkL.jpg) ![Rislone 4747-12PK Super Concentrated Octane Booster, 6. Fluid_Ounces, 12 Pack, yellow - Image 3](https://m.media-amazon.com/images/I/61u3y3CRYYL.jpg) ![Rislone 4747-12PK Super Concentrated Octane Booster, 6. Fluid_Ounces, 12 Pack, yellow - Image 4](https://m.media-amazon.com/images/I/41X0xUy+9EL.jpg) ![Rislone 4747-12PK Super Concentrated Octane Booster, 6. Fluid_Ounces, 12 Pack, yellow - Image 5](https://m.media-amazon.com/images/I/71snbR16JhL.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* ### ⭐⭐⭐⭐⭐ Actually Works! *by M***. on 20 March 2026* ### ⭐⭐⭐⭐⭐ Great item for gasoline. *by A***R on 8 September 2025* ## 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.hr/products/711137310-rislone-4747-12pk-super-concentrated-octane-booster-6-fluid-ounces](https://www.desertcart.hr/products/711137310-rislone-4747-12pk-super-concentrated-octane-booster-6-fluid-ounces) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-16*