--- product_id: 604841028 title: "60103 SI-1 Complete Fuel System Cleaner - 15 Ounce (4 Pack)" brand: "red line" price: "27617 kr" currency: ISK in_stock: true reviews_count: 5 category: "Red Line" url: https://www.desertcart.is/products/604841028-60103-si-1-complete-fuel-system-cleaner-15-ounce-4 store_origin: IS region: Iceland --- # 30% PEA concentration for max cleaning Cleans injectors, valves & combustion chambers 4-pack, 15 oz each for long-lasting use 60103 SI-1 Complete Fuel System Cleaner - 15 Ounce (4 Pack) **Brand:** red line **Price:** 27617 kr **Availability:** ✅ In Stock ## Summary > ⛽ Revive your engine’s soul—clean smarter, drive stronger! ## Quick Answers - **What is this?** 60103 SI-1 Complete Fuel System Cleaner - 15 Ounce (4 Pack) by red line - **How much does it cost?** 27617 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/604841028-60103-si-1-complete-fuel-system-cleaner-15-ounce-4) ## Best For - red line enthusiasts ## Why This Product - Trusted red line brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **One-Tank Wonder:** Just one bottle per tank delivers nearly 100% cleaning efficiency—feel the difference instantly. - • **Value-Packed 4-Pack:** Four 15 oz bottles ensure continuous engine protection and performance boost. - • **Powerhouse PEA Formula:** 30% Polyether Amine concentration blasts carbon buildup like no other. - • **Fuel Efficiency Booster:** Enhances gasoline stability while reducing gum and varnish formation for smoother rides. - • **Comprehensive System Clean:** Targets injectors, carburetors, valves, and combustion chambers for peak engine health. ## Overview Red Line 60103 SI-1 is a concentrated fuel system cleaner with an industry-leading 30% Polyether Amine blend that aggressively removes carbon deposits from injectors, carburetors, valves, and combustion chambers. Sold in a convenient 4-pack of 15 oz bottles, it enhances fuel stability, reduces gum and varnish buildup, and restores engine performance with just one bottle per tank. Trusted by professionals and highly rated by users, it’s the ultimate solution for maintaining a smooth, efficient, and powerful engine. ## Description Concentrated, detergent-based fuel additive cleans injectors, carburetors, valves and combustion chamber deposits with a concentrated blend of the most powerful high-temp and low-temp detergents available, 15 Ounce (4 Pack). Review: Large concentrations of proven cleansers make this product a winner - I should state at the outset that I did not conduct a scientific evaluation of the product. I did not take before and after bore scope pictures of the pistons and cylinders, or anything else along that line; I simply used it, and can report my results. You should keep in mind that my findings are purely subjective. The test vehicle in question is a 1998 Ford Windstar, with just over 300,000 Kms (187,500 miles) on the vehicle. Service history has been extremely spotty, with engine oil left in the vehicle for years at a time. Vehicle was allowed to sit idle for years, and then be pressed into harsh service, and then parked again. Spark plugs had not been changed since at least 2004, and possibly earlier. Air filter was a black mass - or a black mess. Both terms are correct. Surprisingly the vehicle started and ran, albeit very poorly. I changed the plugs, air filter, and did an oil and filter change. This didn't help a lot. On a whim - I was at the parts store, and they had Seafoam on sale - I threw a tin of Seafoam high mileage fuel cleaner into the tank. It had no effect. My curiosity about Seafoam led me to investigate other fuel system cleaners, which led me to Redline fuel system cleaner. The primary active ingredient is a chemical called Polyether Amine, or PEA. This is a fairly common cleanser, used in most top tier engine fuels (at much, much lower levels). Unlike most of the competition, the concentration of PEA in Redline is up around 30% (according to the Material Safety Data Sheet, which you can Google). The competition hovers around 4%. Other cleansers in Redline are at similarly high, muscular levels. On this basis, I decided to order 4 bottles, and give it a try. After the first bottle, there wasn't really any change. Partway through the second bottle, things started to improve. I'm now on the third bottle, and truthfully, it runs at idle like a new engine. Sitting at a stop light, the only way you can really tell the engine is running is by looking at the tach. It's that smooth. There's still a problem on acceleration; I suspect a fuel delivery problem (the fuel filter is probably still the original one it rolled off the assembly line with, and it was so rusted and decrepit I was unable to remove it). But at steady state, the engine feels young and strong. (UPDATE: I was able to get the fuel filter off and changed, and, as expected, that remedied the acceleration problems. In all circumstances, from idle to heavy acceleration, this engine now performs as if it were new.) I'm satisfied that Redline fuel system cleaner made a significant, dramatic improvement in this engine. Hopefully, most people will not have an engine abused as much as this one was. But having experienced the dramatic improvement that resulted from using this product, I feel confident in stating that it will solve pretty much any carbon buildup, glazing and filth problems that can be solved without resorting to a full engine rebuild. If your problems can be remedied by a cleanser, this is the one to buy. Instead of relying on snake oil products from other manufacturers, just check the MSDS for this product. It's actually got high concentrations of working ingredients in it. No other product has anything close. This is why it's expensive. It's a really serious product. Highly recommended. Review: REDUCES BUILD UP IN FUEL SYSTEM - One of the best fuel additives on the market and perfect for reducing carbon and other build ups and keeping fuel injectors clean. ## Features - DESIGNED TO EXCEED EXPECTATIONS: Red Line complete SI-1 fuel system cleaner treatment for cleaning and preventing corrosion in fuel systems - PERFORM AND PROTECT: Fuel additive cleans injectors, carburetors, valve and combustion chamber deposits with a powerful, concentrated blend of high-temp and low-temp detergents - EFFICIENT FUEL BURN: Gas treatment that enhances gasoline stability, while reducing the build up of gum and varnish formation - EASY TO USE: Use one bottle per tank for most effective treatment, additive cleans nearly 100% efficiency in one treatment - 15 Ounce (4 Pack) ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00NQB6O0A | | Best Sellers Rank | #13,670 in Automotive ( See Top 100 in Automotive ) #41 in Automotive Fuel System Cleaners | | Brand | Red Line | | Brand Name | Red Line | | Contains Liquid Contents? | Yes | | Customer Reviews | 4.8 out of 5 stars 1,043 Reviews | | Item Form | Liquid | | Item Volume | 425 Milliliters | | Item Weight | 3.89 Pounds | | Item form | Liquid | | Item volume | 425 Milliliters | | Manufacturer | Red Line | | Material Features | Concentrated | | Material features | Concentrated | | Model Number | 60103 | | Part Number | 60103-4- | | Scent | Unscented | | Size | 15 Fl Oz (Pack of 4) | | Special Features | Concentrated | | Specific Uses For Product | Bottle | | Specific uses for product | Bottle | | UPC | 737534816455 | ## Product Details - **Brand:** Red Line - **Item form:** Liquid - **Material features:** Concentrated - **Scent:** Unscented - **Specific uses for product:** Bottle ## Images ![60103 SI-1 Complete Fuel System Cleaner - 15 Ounce (4 Pack) - Image 1](https://m.media-amazon.com/images/I/71PWCfm-XDL.jpg) ## Questions & Answers **Q: Do you need to change your oil after using this through a full tank of gas?** A: No need to change oil. This is a fuel additive that cleans fuel injectors to better mileage. Does work. **Q: Is this ok as y to use with diesel engines?** A: NO....use the one for diesel (Red Line 85 Plus Diesel Fuel Additive (12 oz.) (Quantity 1)) It is also available on Amazon in several qtys. **Q: does this also help clean the catalytic converter?** A: Maybe it cleans fuel system and injectors. Help clean the CAT? Sorry, I can't answer that question. **Q: Has anyone tried using this as for an engine flush? What were the results?** A: No, and why use it as an engine flush? This product was formulated and meant to be used as a fuel system cleaner and it's an effective one, at least in my case. I've been using in the past 4 years on 3 different vehicles. Best results you'll really notice is using it every 15-20k. Using it more frequently is just a waste. Now, going back to engine flush question, I've used BG EPR. I used it on my wife's 2010 CRV with 150k and0 ## Customer Reviews ### ⭐⭐⭐⭐⭐ Large concentrations of proven cleansers make this product a winner *by A***R on 19 August 2022* I should state at the outset that I did not conduct a scientific evaluation of the product. I did not take before and after bore scope pictures of the pistons and cylinders, or anything else along that line; I simply used it, and can report my results. You should keep in mind that my findings are purely subjective. The test vehicle in question is a 1998 Ford Windstar, with just over 300,000 Kms (187,500 miles) on the vehicle. Service history has been extremely spotty, with engine oil left in the vehicle for years at a time. Vehicle was allowed to sit idle for years, and then be pressed into harsh service, and then parked again. Spark plugs had not been changed since at least 2004, and possibly earlier. Air filter was a black mass - or a black mess. Both terms are correct. Surprisingly the vehicle started and ran, albeit very poorly. I changed the plugs, air filter, and did an oil and filter change. This didn't help a lot. On a whim - I was at the parts store, and they had Seafoam on sale - I threw a tin of Seafoam high mileage fuel cleaner into the tank. It had no effect. My curiosity about Seafoam led me to investigate other fuel system cleaners, which led me to Redline fuel system cleaner. The primary active ingredient is a chemical called Polyether Amine, or PEA. This is a fairly common cleanser, used in most top tier engine fuels (at much, much lower levels). Unlike most of the competition, the concentration of PEA in Redline is up around 30% (according to the Material Safety Data Sheet, which you can Google). The competition hovers around 4%. Other cleansers in Redline are at similarly high, muscular levels. On this basis, I decided to order 4 bottles, and give it a try. After the first bottle, there wasn't really any change. Partway through the second bottle, things started to improve. I'm now on the third bottle, and truthfully, it runs at idle like a new engine. Sitting at a stop light, the only way you can really tell the engine is running is by looking at the tach. It's that smooth. There's still a problem on acceleration; I suspect a fuel delivery problem (the fuel filter is probably still the original one it rolled off the assembly line with, and it was so rusted and decrepit I was unable to remove it). But at steady state, the engine feels young and strong. (UPDATE: I was able to get the fuel filter off and changed, and, as expected, that remedied the acceleration problems. In all circumstances, from idle to heavy acceleration, this engine now performs as if it were new.) I'm satisfied that Redline fuel system cleaner made a significant, dramatic improvement in this engine. Hopefully, most people will not have an engine abused as much as this one was. But having experienced the dramatic improvement that resulted from using this product, I feel confident in stating that it will solve pretty much any carbon buildup, glazing and filth problems that can be solved without resorting to a full engine rebuild. If your problems can be remedied by a cleanser, this is the one to buy. Instead of relying on snake oil products from other manufacturers, just check the MSDS for this product. It's actually got high concentrations of working ingredients in it. No other product has anything close. This is why it's expensive. It's a really serious product. Highly recommended. ### ⭐⭐⭐⭐⭐ REDUCES BUILD UP IN FUEL SYSTEM *by L***R on 28 October 2020* One of the best fuel additives on the market and perfect for reducing carbon and other build ups and keeping fuel injectors clean. ### ⭐⭐⭐⭐⭐ This is what you need *by S***N on 26 June 2026* Excellent price and quick delivery. If you know what your GDI system needs you will order some! ## Frequently Bought Together - Red Line 60103 SI-1 Complete Fuel System Cleaner - 15 Ounce (4 Pack) - Liqui Moly Pro-Line Engine Flush | 500 ml | Oil additive | SKU: 2037 - Liqui Moly 2030 Pro-Line Gasoline System Cleaner, 500 ml, 16.91 Fl Oz (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.is/products/604841028-60103-si-1-complete-fuel-system-cleaner-15-ounce-4](https://www.desertcart.is/products/604841028-60103-si-1-complete-fuel-system-cleaner-15-ounce-4) --- *Product available on Desertcart Iceland* *Store origin: IS* *Last updated: 2026-08-20*