--- product_id: 11062179 title: "BestLine Premium Synthetic Diesel Engine Treatment" brand: "bestline lubricants" price: "€ 50.22" currency: EUR in_stock: false reviews_count: 8 url: https://www.desertcart.hr/products/11062179-bestline-premium-synthetic-diesel-engine-treatment store_origin: HR region: Croatia --- # Boosts fuel economy by up to 15% Reduces friction & engine temperature Ionically bonded lubricant layer BestLine Premium Synthetic Diesel Engine Treatment **Brand:** bestline lubricants **Price:** € 50.22 **Availability:** ❌ Out of Stock ## Summary > ⚙️ Drive smarter, not harder — treat your diesel like a boss! ## Quick Answers - **What is this?** BestLine Premium Synthetic Diesel Engine Treatment by bestline lubricants - **How much does it cost?** € 50.22 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/11062179-bestline-premium-synthetic-diesel-engine-treatment) ## Best For - bestline lubricants enthusiasts ## Why This Product - Trusted bestline lubricants brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Easy Integration:** Just add 16 oz or 10-15% by volume with every oil change—no hassle, all gain. - • **Fuel Efficiency Upgrade:** Optimizes fuel consumption, saving you money and reducing emissions. - • **Engine Armor in a Bottle:** Creates a friction-resistant ionic lubricant shield for lasting engine protection. - • **Cooler, Cleaner Performance:** Lowers internal engine temperature and reduces wear for smoother rides. - • **Trusted by Pros & Enthusiasts:** Proven to revive worn engines and maintain high-performance diesel motors. ## Overview BestLine 853796001429 Premium Synthetic Diesel Engine Treatment is a cutting-edge additive designed to clean, protect, and enhance diesel engines. By forming an ionically bonded lubricant layer, it reduces friction, wear, and engine temperature, leading to improved fuel economy and lower emissions. Easy to use with every oil change, it’s trusted by professionals and enthusiasts alike to extend engine life and optimize performance. ## Description BestLine diesel engine treatment is the most advanced diesel engine oil treatment. BestLine engine treatment will clean, treat and protect internal engine components. The engine will be coated with an ionically bonded layer of lubricant that resists friction and wear, providing efficiency and performance. Review: BestLine ((IT WORKS!!)) - I never rate anything at 5 stars unless it has proven to be absolutely worth it. I have tried all the known market leading brands in the last 25 years, then finally!.... Comes along an engine oil additive that actually works! Yes I repeat and stand by my statement, an engine oil additive that actually works unlike all the others!.... My engine oil light had a broken bulb and I didn't see that my oil was low and for three days when I started my engine it made a shearing noise when I turned on the ignition, which went away after about 20 seconds. So I thought it was the fuel regulator as when you start my model of car the fuel rail regulator can make a noise. Little did I know I was running out of oil and the pistons were rubbing metal to metal! I gave it a thrash on the highway and stopped for a while at a DHL depot to collect a parcel. When I went to the car and started it and got on the road again the engine kept wanting to quit. I managed to limp into a garage and when I got out of the car the cylinders were making the loudest squealing noise I have ever heard! It died and seized in seconds. But no engine oil warning light was working,.... the bulb had blown! I left it to cool and filled it to the full mark. and managed to start it. I limped home and must have used most of the oil to get there. Smoke was billowing out of the exhaust and I thought the old girl was dead. I showed it to my mechanic the next day and he said he thought it was a gonner, but I didn't give up yet. I ordered BestLine from desertcart and it arrived quickly. I put it in the engine and it smoothed out significantly. It is now running sweeter and smoother than it ever did as the parts have been polished by the BestLine! I Highly recommend this product to anyone, if you have a slightly worn engine you want to keep for a long time, Save fuel and forget about astronomical repair bills this is the one to go for look nowhere else! Like I said in the beginning, ((IT WORKS!!))......A month on. WARNING! I ordered the same Item BestLine 853796001429 Premium Synthetic Diesel Engine Treatment - 16 oz again, and was sent ((BestLine premium synthetic HD instead!)) It is thinner and not fit for purpose! The reason why I ordered it in the first place was because I have a piston that has a worn or seized piston ring! And my order has been changed by the seller. BUYERS BEWARE! They cannot be relied on to send the item you paid for! I am not happy one bit and will make sure they pay dearly for their switch. BestLine premium synthetic HD isn't even sold on desertcart, you cant find it anywhere here! Update... three weeks on, I contacted BestLine admin directly. I was contacted promptly by Jane of their customer service team who was very apologetic and explained they sent their superior industrial high pressure lubricant sent me a replacement + a bottle of their diesel fuel treatment for my trouble. I am pleased with their customer service, I highly recommend this product. Review: Surprised as much as everyone else - I tryed the gas one , so i got this for diesel i have. So this review is on my gas car . I expect the same for the diesel .Out of all the magic ,oil additives , that claim 20 % this, better that ,more power , increased mpg . This one actually seems , i know i know, well it does seem to work .! I am as shocked as every one reading this . My motor feels smoother , and get this, quieter ? No little ticking noises , idle os better . I run a supercharged motor making over 550 hp . I worry about damaging it because it is under a lot of stress compared with a non boosted motor . It was a big gamble trying this . My oil pressure is a little better which means it helps keep viscosity up and less break down affter hard runs . No i don't feel more power , i would need a back to back , oil with and with out best line to see that on a dyno. But am cautiously pleased .i just added a little to my snow blower at recommended amout for kicks . I will be ordering more . Really give it a try , i never recommend stuff . i think it maybe a product that does things other than take our money . ## Features - Diesel engine treatment cleans and treats internal components - Reduces friction, temperature and wear - Improves fuel economy and performance - Reduces pollution and fuel consumption - Add one bottle (16 ounces) or 10-15 percent by volume to engine oil with each oil change ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0093XZG1S | | Brand | BestLine Lubricants | | Customer Reviews | 4.4 4.4 out of 5 stars (93) | | Date First Available | December 11, 2011 | | Item Weight | 1.15 pounds | | Item model number | 853796001429 | | Manufacturer | BestLine | | Manufacturer Part Number | 853796001429 | | Model | 853796001429 | | Package Dimensions | 7.7 x 3.7 x 2.1 inches | | Voltage | 12 Volts | ## Images ![BestLine Premium Synthetic Diesel Engine Treatment - Image 1](https://m.media-amazon.com/images/I/71oS5FDnpFL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ BestLine ((IT WORKS!!)) *by M***B on December 12, 2014* I never rate anything at 5 stars unless it has proven to be absolutely worth it. I have tried all the known market leading brands in the last 25 years, then finally!.... Comes along an engine oil additive that actually works! Yes I repeat and stand by my statement, an engine oil additive that actually works unlike all the others!.... My engine oil light had a broken bulb and I didn't see that my oil was low and for three days when I started my engine it made a shearing noise when I turned on the ignition, which went away after about 20 seconds. So I thought it was the fuel regulator as when you start my model of car the fuel rail regulator can make a noise. Little did I know I was running out of oil and the pistons were rubbing metal to metal! I gave it a thrash on the highway and stopped for a while at a DHL depot to collect a parcel. When I went to the car and started it and got on the road again the engine kept wanting to quit. I managed to limp into a garage and when I got out of the car the cylinders were making the loudest squealing noise I have ever heard! It died and seized in seconds. But no engine oil warning light was working,.... the bulb had blown! I left it to cool and filled it to the full mark. and managed to start it. I limped home and must have used most of the oil to get there. Smoke was billowing out of the exhaust and I thought the old girl was dead. I showed it to my mechanic the next day and he said he thought it was a gonner, but I didn't give up yet. I ordered BestLine from Amazon and it arrived quickly. I put it in the engine and it smoothed out significantly. It is now running sweeter and smoother than it ever did as the parts have been polished by the BestLine! I Highly recommend this product to anyone, if you have a slightly worn engine you want to keep for a long time, Save fuel and forget about astronomical repair bills this is the one to go for look nowhere else! Like I said in the beginning, ((IT WORKS!!))......A month on. WARNING! I ordered the same Item BestLine 853796001429 Premium Synthetic Diesel Engine Treatment - 16 oz again, and was sent ((BestLine premium synthetic HD instead!)) It is thinner and not fit for purpose! The reason why I ordered it in the first place was because I have a piston that has a worn or seized piston ring! And my order has been changed by the seller. BUYERS BEWARE! They cannot be relied on to send the item you paid for! I am not happy one bit and will make sure they pay dearly for their switch. BestLine premium synthetic HD isn't even sold on Amazon, you cant find it anywhere here! Update... three weeks on, I contacted BestLine admin directly. I was contacted promptly by Jane of their customer service team who was very apologetic and explained they sent their superior industrial high pressure lubricant sent me a replacement + a bottle of their diesel fuel treatment for my trouble. I am pleased with their customer service, I highly recommend this product. ### ⭐⭐⭐⭐⭐ Surprised as much as everyone else *by P***E on November 27, 2016* I tryed the gas one , so i got this for diesel i have. So this review is on my gas car . I expect the same for the diesel .Out of all the magic ,oil additives , that claim 20 % this, better that ,more power , increased mpg . This one actually seems , i know i know, well it does seem to work .! I am as shocked as every one reading this . My motor feels smoother , and get this, quieter ? No little ticking noises , idle os better . I run a supercharged motor making over 550 hp . I worry about damaging it because it is under a lot of stress compared with a non boosted motor . It was a big gamble trying this . My oil pressure is a little better which means it helps keep viscosity up and less break down affter hard runs . No i don't feel more power , i would need a back to back , oil with and with out best line to see that on a dyno. But am cautiously pleased .i just added a little to my snow blower at recommended amout for kicks . I will be ordering more . Really give it a try , i never recommend stuff . i think it maybe a product that does things other than take our money . ### ⭐⭐⭐⭐ Four Stars *by R***1 on January 20, 2015* great product, when i add to engine the engine run smoothly and a remarkable diffenrence in the noise level --- ## 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/11062179-bestline-premium-synthetic-diesel-engine-treatment](https://www.desertcart.hr/products/11062179-bestline-premium-synthetic-diesel-engine-treatment) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-08*