--- product_id: 33434788 title: "LiquiMoly 3721 Engine Oil Additive" brand: "liqui moly" price: "415 zΕ‚" currency: PLN in_stock: true reviews_count: 13 category: "Liqui Moly" url: https://www.desertcart.pl/products/33434788-liquimoly-3721-engine-oil-additive store_origin: PL region: Poland --- # Stable under high thermal & dynamic loads Immediate engine smoothness in ~10 miles Compatible with all common filter systems LiquiMoly 3721 Engine Oil Additive **Brand:** liqui moly **Price:** 415 zΕ‚ **Availability:** βœ… In Stock ## Summary > πŸš— Smooth rides start here β€” upgrade your engine’s vibe instantly! ## Quick Answers - **What is this?** LiquiMoly 3721 Engine Oil Additive by liqui moly - **How much does it cost?** 415 zΕ‚ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/33434788-liquimoly-3721-engine-oil-additive) ## Best For - liqui moly enthusiasts ## Why This Product - Trusted liqui moly brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **No Core Charge Hassle:** Simple, straightforward use with zero extra fees πŸ’Έ - β€’ **Trusted by Enthusiasts:** Top-rated additive with 4.7 stars from 2,000+ users ⭐ - β€’ **Instant Smoothness Boost:** Feel the engine quiet down within just 10-12 miles ⏱️ - β€’ **Thermal & Dynamic Stability:** Keeps your engine cool and composed under pressure πŸ”₯ - β€’ **Universal Filter Compatibility:** Works seamlessly with all standard oil filters βš™οΈ ## Overview LiquiMoly 3721 Engine Oil Additive is a premium, no-core-charge formula designed to stabilize engine oil under extreme thermal and dynamic stress. Compatible with all common filter systems, it delivers noticeable engine smoothness within 10-12 miles of use, enhancing driving comfort and reducing noise. Trusted by thousands, it’s a must-have for any car, truck, or motorcycle enthusiast seeking a quieter, more refined ride. ## Description Liqui Moly 3721 Engine Oil AdditiveNo Core Charge RequiredParts Interchange 3721, 3721, 3721, 3721 Review: AMAZING - IT'S IN ALL MY CARS NOW (AND ALL MY FRIENDS!) - The way I use it: AFTER an oil change, with motor warm, shake the hell out of it and pour it in. IMMEDIATELY start driving. Somewhere about 10-12 miles, you will hear the difference, and your engine will continue to get smoother. Added this to a '20 Honda Civic that I could not drive in Sport mode. Just nasty noises! Now, i use S-mode on the on ramp, and I sometimes forget to take it out. I was five miles down the road the other day, and realized I was still in a lower gear, that's how quiet. Bimmers, Miatas, Tundras - they all love it. Smoooooth is number one result. Umm ... I don't see any milage gains bc it makes driving more Fun :)) Review: WORKS AS ADVERTISED - THIS IS AN ITEM I WILL CONTINUE TO BUY OVER THE YEARS I BELEIVE IT DOES WHAT THEY CLAIM AND MORE I USE MY CAR ON LONG TRIPS AND IT GAVE ME A QUIETER RUNNING ENGINE AND GAVEME A LITTLE BIT BETTER GASMILAGE ## Features - Single Quantity - No Core Charge Req - Stable even under high thermal and dynamic permanent loads - No deposits and absolutely compatible with all commonly used filter systems ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01KGHA43Y | | Best Sellers Rank | #8,669 in Automotive ( See Top 100 in Automotive ) #23 in Engine & Oil Fluid Additives | | Brand Name | Liqui Moly | | Compatible with Vehicle Type | Car, Truck, Motorcycle, ATV, etc. | | Container Type | Bottle | | Customer Reviews | 4.8 4.8 out of 5 stars (2,096) | | Item Weight | 680 Grams | | Liquid Volume | 0.3 Liters | | Manufacturer | LiquiMoly | | Manufacturer Part Number | 3721 | | UPC | 672713965381 826732922003 | | Unit Count | 20.28 Fluid Ounces | | Viscosity | 5 sae_grade | ## Product Details - **Brand:** Liqui Moly - **Liquid Volume:** 0.3 Liters - **Package Information:** Bottle - **Vehicle Service Type:** Car, Truck, Motorcycle, ATV, etc. - **Viscosity:** 5 sae_grade ## Images ![LiquiMoly 3721 Engine Oil Additive - Image 1](https://m.media-amazon.com/images/I/71c55beZhNL.jpg) ## Questions & Answers **Q: Can this be used in conjunction with the anti-friction oil treatment,or should i pick one or the other to use? (2011 bmw 535i with 72kmiles)** A: I contacted liqui moly about that and they said they do not recommend mixing because of the metals in each of the additives ceratec should do the trick no need for other things **Q: Does this void engine warranty ?** A: Absolutely it does, for Volkswagen at least. They make it very clear that you MUST use only the approved oil with nothing else. The engines are designed very specifically and are highly stressed. They will only work right with the specified oil. **Q: How often can i use this product?** A: I use it every 4 or 5 oil changes if you drive a lot, if not then every 2 years is what I do **Q: is all you need to do is drain the oil, oil do u have to open up the oil pan?** A: So, the answer is no about the oil pan. Using factory drain plug, let all of the oil out. Replace oil filter. Refill with fresh oil. Add 1 can of treatment. Drive until next oil change. Next oil change just do a normal oil change. And so on. Then in 50,000 miles, use the additive again. (I am just being more specific) ## Customer Reviews ### ⭐⭐⭐⭐⭐ AMAZING - IT'S IN ALL MY CARS NOW (AND ALL MY FRIENDS!) *by X***3 on January 17, 2026* The way I use it: AFTER an oil change, with motor warm, shake the hell out of it and pour it in. IMMEDIATELY start driving. Somewhere about 10-12 miles, you will hear the difference, and your engine will continue to get smoother. Added this to a '20 Honda Civic that I could not drive in Sport mode. Just nasty noises! Now, i use S-mode on the on ramp, and I sometimes forget to take it out. I was five miles down the road the other day, and realized I was still in a lower gear, that's how quiet. Bimmers, Miatas, Tundras - they all love it. Smoooooth is number one result. Umm ... I don't see any milage gains bc it makes driving more Fun :)) ### ⭐⭐⭐⭐⭐ WORKS AS ADVERTISED *by F***K on March 29, 2026* THIS IS AN ITEM I WILL CONTINUE TO BUY OVER THE YEARS I BELEIVE IT DOES WHAT THEY CLAIM AND MORE I USE MY CAR ON LONG TRIPS AND IT GAVE ME A QUIETER RUNNING ENGINE AND GAVEME A LITTLE BIT BETTER GASMILAGE ### ⭐⭐⭐⭐⭐ Excellent additive! *by D***L on March 7, 2025* This is good stuff! My engine got a little bit more quiet, and noticeably smoother, and I got a little better gas mileage on highway trips about 2 1/4 miles per gallon more. Just so you know, it’s in a 2006 Mercedes-Benz C230 sport with 206,000 miles. I had changed the oil about 2500 miles ago with liquid Moly 0 W-40, and I just poured it in. No lie you can actually hear it circulate and quiet down the engine and it’s really cool to hear. ## Frequently Bought Together - LiquiMoly 3721 Engine Oil Additive - 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? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/33434788-liquimoly-3721-engine-oil-additive](https://www.desertcart.pl/products/33434788-liquimoly-3721-engine-oil-additive) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-06*