--- product_id: 31063968 title: "Opti-Lube Fuel Additive, Chemical, & Oil Flexible Funnel Spout for 4oz, 8oz, 16oz, Quart, and Gallon Bottles (Capless Funnel)" brand: "opti-lube" price: "$31.64" currency: USD in_stock: true category: "Opti Lube" url: https://www.desertcart.us/products/31063968-opti-lube-fuel-additive-chemical-and-oil-flexible-funnel-spout store_origin: US region: United States of America --- # Fits 4oz to gallon bottles Spillproof airtight design Ergonomic 5.5” flexible spout Opti-Lube Fuel Additive, Chemical, & Oil Flexible Funnel Spout for 4oz, 8oz, 16oz, Quart, and Gallon Bottles (Capless Funnel) **Brand:** opti-lube **Price:** $31.64 **Availability:** ✅ In Stock ## Summary > ⛽ Pour Perfectly, Every Time — Never Miss a Drop! ## Quick Answers - **What is this?** Opti-Lube Fuel Additive, Chemical, & Oil Flexible Funnel Spout for 4oz, 8oz, 16oz, Quart, and Gallon Bottles (Capless Funnel) by opti-lube - **How much does it cost?** $31.64 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/31063968-opti-lube-fuel-additive-chemical-and-oil-flexible-funnel-spout) ## Best For - opti-lube enthusiasts ## Why This Product - Trusted opti-lube brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Ergonomic Long Spout:** 5.5-inch flexible funnel easily opens capless fuel doors for mess-free pouring every time. - • **Spill & Leak Prevention:** Airtight neck design ensures zero spills or leaks, keeping your garage spotless and stress-free. - • **Durable & Flexible Build:** Heavy-duty plastic construction bends to your needs, built to last through countless refills. - • **Compact & Brightly Colored:** At just 5.5 inches and vibrant green, it’s easy to store and impossible to misplace. - • **Universal Fit for Fuel Additives:** Seamlessly attaches to 4oz, 8oz, 16oz, quart & gallon Opti-Lube bottles for ultimate versatility. ## Overview The Opti-Lube Fuel Additive Funnel is a versatile, spillproof funnel designed to fit all Opti-Lube bottles from 4oz to gallon sizes. Its 5.5-inch ergonomic flexible spout easily accesses capless fuel tanks, preventing spills and leaks with an airtight design. Compact, durable, and brightly colored for easy storage, it streamlines fuel additive application for a cleaner, more efficient fueling experience. ## Description At Opti-Lube, we’re dedicated to helping you improve your engine’s fuel tank with our superior fuel additives and cleaners. However, you might need something to help you funnel these high-quality products into your fuel tank. That’s where our fuel additive funnel comes into play. This funnel is specifically designed to work with Opti-Lube bottles and is suitable for 4-, 8-, and 16-ounce bottles along with quart and gallon jugs. Simply screw it onto the cap, and you’re all set! This funnel has a long, ergonomic spout that is ideal for pouring additive or cleaner into your fuel tank. It is even long enough to push past the second fuel door, so you’ll have complete access to your fuel tank. This funnel also has a water-tight cap, so you don’t have to worry about anything leaking or spilling while it’s in storage. Our funnel makes your job easier. It’ll prevent leaks and spills while pouring your additive into your tank, so you won’t have any big messes to clean up. This funnel measures at 5.5”, making it the perfect size for storage. Just stow it away on the shelf of your shop or garage. This funnel comes in a bright green color, so it’s hard to miss! It’s that simple! Our funnel is made from heavy-duty, high-quality plastic, ensuring that you’ll be able to use it for years to come. Although it’s made from plastic, it’s extremely flexible. You can insert it at different angles, allowing you to get the most from your fuel additive. Make your life easier by adding this fuel additive funnel to your car and truck supplies today. ## Features - DISPENSES FUEL INTO YOUR TANK: Putting fuel additive into your tank just got easier thanks to our handy fuel additive funnel. This funnel creates a streamlined channel for you to pour your fuel into, making the job quick and efficient. Add it to your car care supplies and automotive accessories today! - FITS MOST BOTTLES: This fuel additive funnel was designed to fit all Opti-Lube bottles, it is compatible with 4-, 8-, and 16-ounce bottles. It also fits quart and gallon jugs. You can use it on a variety of different-sized bottles so that you can easily dispense product directly into your fuel tank. Fits 38/400, 28/410, and 28/400 closures. - HELPS OPEN SECOND FUEL DOOR: You don’t need to worry about jamming or forcing this fuel additive funnel into your capless fuel tank filler. Its long ergonomic oil spout easily opens the second fuel door, giving you full access to your fuel tank. Altogether, this funnel system measures 5.5” and fits all Opti-Lube bottles. - PREVENTS SPILLING & LEAKING: This spillproof funnel will help reduce messes in your garage or shop. Its long, narrow neck creates an airtight funnel, preventing additive from spilling and leaking. Finally, you can enjoy a cleaner, smoother process. Keep your space tidy using this fuel additive funnel by Opti-Lube. - EASY STORAGE: This fuel additive funnel comes with a water-tight lid for easy and convenient storage. It measures only 5.5”, making it the perfect size to stow it away. You can put this lightweight funnel anywhere around your garage or shop. It’s also a bright green color, so you’ll never lose it or misplace it! ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01D28SRY2 | | Best Sellers Rank | #86,692 in Automotive ( See Top 100 in Automotive ) #186 in Oil Funnels | | Brand Name | Opti-Lube | | Capacity | 4 ounces | | Color | Green | | Customer Reviews | 4.4 4.4 out of 5 stars (115) | | Item Dimensions W x H | 5.5"W x 5.5"H | | Manufacturer | Opti-Lube | | Material Type | Plastic | | Model Number | OPT-GFS | | Part Number | OPT-GFS | ## Product Details - **Brand:** Opti-Lube - **Capacity:** 4 ounces - **Color:** Green - **Material:** Plastic - **Product Dimensions:** 5.5"W x 5.5"H ## Images ![Opti-Lube Fuel Additive, Chemical, & Oil Flexible Funnel Spout for 4oz, 8oz, 16oz, Quart, and Gallon Bottles (Capless Funnel) - Image 1](https://m.media-amazon.com/images/I/51JZIePBddL.jpg) ![Opti-Lube Fuel Additive, Chemical, & Oil Flexible Funnel Spout for 4oz, 8oz, 16oz, Quart, and Gallon Bottles (Capless Funnel) - Image 2](https://m.media-amazon.com/images/I/51ssvwxxLML.jpg) ![Opti-Lube Fuel Additive, Chemical, & Oil Flexible Funnel Spout for 4oz, 8oz, 16oz, Quart, and Gallon Bottles (Capless Funnel) - Image 3](https://m.media-amazon.com/images/I/71gGuOYOdlL.jpg) ![Opti-Lube Fuel Additive, Chemical, & Oil Flexible Funnel Spout for 4oz, 8oz, 16oz, Quart, and Gallon Bottles (Capless Funnel) - Image 4](https://m.media-amazon.com/images/I/51VToCFZ1ML.jpg) ## Frequently Bought Together - Opti-Lube Fuel Additive, Chemical, & Oil Flexible Funnel Spout for 4oz, 8oz, 16oz, Quart, and Gallon Bottles (Capless Funnel) - Opti-Lube XPD All-in-ONE Diesel Fuel ADDITIVE: 4oz Bottles (12 Pack Case) - Opti-Lube XPD All Seasons Diesel Fuel Additive: 1 Gallon with Accessories (1 Hand Pump & 2 Empty 8oz Bottles) (1 Gallon XPD with Hand Pump and Regular Accessory Bottles) --- ## 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.us/products/31063968-opti-lube-fuel-additive-chemical-and-oil-flexible-funnel-spout](https://www.desertcart.us/products/31063968-opti-lube-fuel-additive-chemical-and-oil-flexible-funnel-spout) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-09*