--- product_id: 575611116 title: "PRI-D Complete Diesel Treatment – Super Concentrated Diesel Fuel Additive Treats up to 256 Gallons, Helps Support Fuel Lubricity and Stability for Diesel Engines, 16 oz (1 Pack)" brand: "safecastle" price: "¥11847" currency: JPY in_stock: true reviews_count: 8 url: https://www.desertcart.jp/products/575611116-pri-d-complete-diesel-treatment-super-concentrated-diesel-fuel-additive store_origin: JP region: Japan --- # Treats up to 256 gallons Reduces fuel pump wear by 45% Prolongs diesel fuel storage life PRI-D Complete Diesel Treatment – Super Concentrated Diesel Fuel Additive Treats up to 256 Gallons, Helps Support Fuel Lubricity and Stability for Diesel Engines, 16 oz (1 Pack) **Brand:** safecastle **Price:** ¥11847 **Availability:** ✅ In Stock ## Summary > ⛽ Keep your diesel fresh, fierce, and future-proof! ## Quick Answers - **What is this?** PRI-D Complete Diesel Treatment – Super Concentrated Diesel Fuel Additive Treats up to 256 Gallons, Helps Support Fuel Lubricity and Stability for Diesel Engines, 16 oz (1 Pack) by safecastle - **How much does it cost?** ¥11847 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/575611116-pri-d-complete-diesel-treatment-super-concentrated-diesel-fuel-additive) ## Best For - safecastle enthusiasts ## Why This Product - Trusted safecastle brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Sludge-Free Fuel System:** Prevents deposit buildup and keeps tanks and fuel lines clean for consistent, reliable engine performance. - • **Maximize Your Fuel Efficiency:** Super concentrated formula treats massive 256 gallons per 16 oz bottle, stretching your investment further. - • **Keep Your Diesel Fresh & Ready:** Stabilizes fuel during long-term storage, restoring refinery-fresh quality when you need it most. - • **Protect Critical Engine Components:** Boosts fuel lubricity to reduce wear on fuel pumps by up to 45%, cutting costly maintenance. - • **Trusted by Pros, Loved by Preparedness Experts:** Highly rated with 4.7 stars, engineered for emergency readiness and everyday diesel care. ## Overview PRI-D Complete Diesel Treatment is a super concentrated additive designed to treat up to 256 gallons of diesel fuel per 16 oz bottle. It stabilizes fuel during storage, restores refinery freshness, enhances lubricity to reduce fuel pump wear by 45%, and prevents sludge buildup, ensuring reliable engine performance and extended equipment life. Ideal for emergency preparedness and everyday diesel maintenance. ## Description PRI-D 16oz Complete Diesel Treatment is formulated to help maintain diesel fuel quality and support overall engine performance. Designed for use in diesel engines, this treatment helps stabilize fuel during storage, reduce deposits, and keep fuel systems operating smoothly. Designed to support complete diesel fuel system care. It works to stabilize fuel, reduce deposit buildup & support consistent engine performance over time. Ideal for everyday use or long-term storage, it helps protect your diesel investment and keep your equipment running reliably when you need it. PRI-D’s highly concentrated formula delivers powerful results, treating more fuel while saving money and ensuring maximum effectiveness. Engineered with a heavy-duty formula, PRI-D delivers reliable performance and protection even in demanding diesel applications. Manufactured to professional standards, PRI-D delivers consistent, high-quality performance and reliable, long-lasting diesel fuel treatment. Designed for excellent coverage and efficiency, PRI-D treats more fuel with less product, reducing waste and minimizing frequent treatment. ## Features - Emergency diesel fuel can degrade over time - Storing diesel fuel with PRI-D diesel treatment will prolong the storage time of your emergency fuel and can actually restore diesel to refinery freshness if needed. - Power Research Inc PRI-D diesel treatment is ideal for emergency diesel fuel treatment. It increases the lubricity of your fuel, keeps tanks and fuel lines sludge free, and improves engine performance. - For an emergency preparedness minded person, the value of PRI-D cannot be calculated. This diesel treatment product keeps fuel at peak stability levels and prevents fuel degradation during long-term storage. This is important because one of the most common failures of emergency equipment is bad fuel that has been stored too long. - Another key benefit of PRI-D is extended life of fuel pumps. Due to the high lubricity of this additive, wear reduction on ULSD fuels can be reduced by up to 45 percent. This can really reduce maintenance costs. ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B096Y89G8F | | Best Sellers Rank | #128,827 in Automotive (See Top 100 in Automotive) #103 in Diesel Additives | | Brand | SAFECASTLE | | Customer Reviews | 4.7 4.7 out of 5 stars (93) 4.7 out of 5 stars | | Date First Available | June 10, 2021 | | Item Weight | 1 pounds | | Manufacturer | Pri | | Manufacturer Part Number | Pri-d | | Package Dimensions | 7.05 x 4.37 x 2.13 inches | ## Images ![PRI-D Complete Diesel Treatment – Super Concentrated Diesel Fuel Additive Treats up to 256 Gallons, Helps Support Fuel Lubricity and Stability for Diesel Engines, 16 oz (1 Pack) - Image 1](https://m.media-amazon.com/images/I/61NpAUzZ7VS.jpg) ![PRI-D Complete Diesel Treatment – Super Concentrated Diesel Fuel Additive Treats up to 256 Gallons, Helps Support Fuel Lubricity and Stability for Diesel Engines, 16 oz (1 Pack) - Image 2](https://m.media-amazon.com/images/I/81DxGSx2T6L.jpg) ![PRI-D Complete Diesel Treatment – Super Concentrated Diesel Fuel Additive Treats up to 256 Gallons, Helps Support Fuel Lubricity and Stability for Diesel Engines, 16 oz (1 Pack) - Image 3](https://m.media-amazon.com/images/I/81lwI2NJ7uL.jpg) ![PRI-D Complete Diesel Treatment – Super Concentrated Diesel Fuel Additive Treats up to 256 Gallons, Helps Support Fuel Lubricity and Stability for Diesel Engines, 16 oz (1 Pack) - Image 4](https://m.media-amazon.com/images/I/81Ev0X9nIGL.jpg) ![PRI-D Complete Diesel Treatment – Super Concentrated Diesel Fuel Additive Treats up to 256 Gallons, Helps Support Fuel Lubricity and Stability for Diesel Engines, 16 oz (1 Pack) - Image 5](https://m.media-amazon.com/images/I/81A2KfyTcfL.jpg) ## Available Options This product comes in different **Flavor Name, Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great order *by on Reviewed in the United States July 7, 2026* Just what we wanted, and got it fast... ### ⭐⭐⭐⭐⭐ Works *by on Reviewed in the United States May 13, 2026* I think it works, has a lot of good reviews ### ⭐⭐⭐⭐⭐ The only trustworthy fuel additive I will use. *by on Reviewed in the United States March 30, 2025* This is a real fuel additive that isn't snake-oil medicine. It is used by the petroleum industry in their own storage systems. I use this to stabilize fuel in a generator. Every 14-months on the day, we fire it up to check the functionality - and every time it starts up and runs at full power without any issues. After the 1 hour runtime test, we drain and discard the old fuel for new...so I can't comment on how long this fuel additive will work beyond 14 months. Note - we do not use fuel with Alcohol mixed in. Before using this product, we constantly ran into fuel degradation problems. Generator is in an unregulated storage shed, so it gets hot/cold. No other fuel additive seemed to work. ## Frequently Bought Together - SAFECASTLE PRI-D Fuel Diesel Treatment for Lubricity & Stability Improved Performance, Maintenance, and Emissions Reductions, Maximum Lubricity Protection, Super Concentrated & Safe (16 Oz (1 Pack)) - PRI CP123 G Gasoline Treatment - 16 oz. - SUPER CONCENTRATED PRI-G COMPLETE GASOLINE TREATMENT for all engine types IDEAL for E-10 GASOLINE --- ## 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/575611116-pri-d-complete-diesel-treatment-super-concentrated-diesel-fuel-additive](https://www.desertcart.jp/products/575611116-pri-d-complete-diesel-treatment-super-concentrated-diesel-fuel-additive) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-10*