--- product_id: 711137310 title: "Rislone 4747-12PK Super Concentrated Octane Booster, 6. Fluid_Ounces, 12 Pack, yellow" brand: "bar's leaks" price: "¥32103" currency: JPY in_stock: true reviews_count: 5 category: "Bar's Leaks" url: https://www.desertcart.jp/products/711137310-rislone-4747-12pk-super-concentrated-octane-booster-6-fluid-ounces store_origin: JP region: Japan --- # Boosts octane 20+ points Treats up to 20 gallons fuel Stops engine knock & ping Rislone 4747-12PK Super Concentrated Octane Booster, 6. Fluid_Ounces, 12 Pack, yellow **Brand:** bar's leaks **Price:** ¥32103 **Availability:** ✅ In Stock ## Summary > ⚡ Ignite your ride with unstoppable power and precision! ## 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?** ¥32103 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/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 - • **Knockout Formula:** Anti-knock tech eliminates engine ping from low-quality fuel - • **Tank-Ready Design:** Bottle fits all gas tanks including capless and obstructed systems - • **Power Surge Guaranteed:** Restores lost horsepower for peak engine performance - • **Engine-Safe Concentration:** Highest legal MMT concentrate without harming catalytic converters - • **Universal Fuel Compatibility:** Works seamlessly with unleaded, ethanol blends, and racing fuels ## Overview Rislone 4747-12PK Super Concentrated Octane Booster is a street-legal, high-performance fuel additive that raises octane by over 20 points, eliminating engine knock and restoring horsepower. Compatible with all unleaded and ethanol fuels, it protects engine components while optimizing spark timing for enhanced power, fuel efficiency, and reduced emissions. Designed for all fuel systems, this 12-pack ensures your vehicle runs smoother and stronger, whether on the street, track, or off-road. ## 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 well - Price of premium gasoline is skyrocketed recently, so I tried this additive with regular gas. Car is turbocharged and designed to take premium only, but with this mix it is working surprisingly well. No knocking, power is good. It is too early to tell if gas milage is improved, but so far it looks promising. If price on this booster stays, it is possible to save 5+ dollars per 15 gallon tank with the switch from premium to regular gas. ## 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 - 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* 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 well *by K***L on 27 May 2026* Price of premium gasoline is skyrocketed recently, so I tried this additive with regular gas. Car is turbocharged and designed to take premium only, but with this mix it is working surprisingly well. No knocking, power is good. It is too early to tell if gas milage is improved, but so far it looks promising. If price on this booster stays, it is possible to save 5+ dollars per 15 gallon tank with the switch from premium to regular gas. ### ⭐⭐⭐⭐⭐ Actually Works! *by M***. on 20 March 2026* I decided to purchase for my 2025 Ford Ranger Raptor to determine if I could tell a difference in horse power performance, even though I added a performance calibration computer program along with a Process West enlarged air box, to include the 3.5" cross over pipes to allow the turbos to really breath. My comments of the product are not based on anyrecent Dyno testing. I added one bottle to each of the 5-full tanks of gasoline of Sunoco 94 octane fuel. I did this to give the computer to evaluate and "learn" the fuel mixture change. On the 5th full tank full, I added one bottle and hit the road and accelerator. Truly I was shocked that the product made a noticeable change I could feel from behind the wheel. Both from a full throttle start, highway throtle punch and residential road driving acceleration. Again, not a dyno test but if I can edge out a noticeable difference, that's all I was l99king for. Without any details, I must have surprised drivers in their modified vehicles in the performance of this mid-size pick-up when I pulled away in small level straight and drag racing situations that arose. Additional performance parts will be added in the very near future but at least the gasoline octane booster proved its point to me. ## 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.jp/products/711137310-rislone-4747-12pk-super-concentrated-octane-booster-6-fluid-ounces](https://www.desertcart.jp/products/711137310-rislone-4747-12pk-super-concentrated-octane-booster-6-fluid-ounces) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-07-21*