---
product_id: 33434788
title: "LiquiMoly 3721 Engine Oil Additive"
brand: "liqui moly"
price: "€ 104.93"
currency: EUR
in_stock: true
reviews_count: 13
category: "Liqui Moly"
url: https://www.desertcart.gr/products/33434788-liquimoly-3721-engine-oil-additive
store_origin: GR
region: Greece
---

# Boosts engine smoothness & driving enjoyment Stable under high thermal & dynamic loads Compatible with all common filter systems LiquiMoly 3721 Engine Oil Additive

**Brand:** liqui moly
**Price:** € 104.93
**Availability:** ✅ In Stock

## Summary

> 🚗 Smooth rides start here — unlock your engine’s hidden potential!

## Quick Answers

- **What is this?** LiquiMoly 3721 Engine Oil Additive by liqui moly
- **How much does it cost?** € 104.93 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/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

- • **Thermal Toughness:** Engine oil additive that stays stable even under extreme heat and stress 🔥
- • **Instant Smoothness:** Noticeably quieter, smoother engine performance within 10-12 miles of use ⛽
- • **No Core Charge Hassle:** Simple, no extra fees or returns required—just add and drive
- • **Trusted by Enthusiasts:** Top-rated with 4.7 stars and loved by drivers of Hondas, Bimmers, Miatas, and more
- • **Universal Compatibility:** Works seamlessly with all commonly used oil filter systems ⚙️

## Overview

LiquiMoly 3721 Engine Oil Additive is a high-performance, universally compatible formula designed to stabilize engine oil under extreme thermal and dynamic loads. It prevents deposits, works with all common filter systems, and delivers a noticeably smoother, quieter engine experience shortly after application. Trusted by thousands with a 4.7-star rating, it requires no core charge and fits cars, trucks, motorcycles, and ATVs alike.

## 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: A few comments on Ceratec Liqui Moly - Purchase price.was great. Product really worked for me. I did notice a slight improvement in fuel efficiency and power. Most of all it did aid in engine sound. Do read the pros and cons on the product before using it. Reviews on the product are very informative but do read up on the pros and cons of the product, especially do notice the date of production on item. This is very important.

## 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 |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #9,727 in Automotive ( See Top 100 in Automotive ) #25 in Engine & Oil Fluid Additives |
| Brand | Liqui Moly |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,948) |
| Date First Available | September 22, 2015 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.46 pounds |
| Item model number | 3721 |
| Manufacturer | LiquiMoly |
| Manufacturer Part Number | 3721 |
| SAE J300 Viscosity Grade | 5W |
| UPC | 672713965381 826732922003 |
| Vehicle Service Type | Car, Truck, Motorcycle, ATV, etc. |
| 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 :))

### ⭐⭐⭐⭐⭐ A few comments on Ceratec Liqui Moly
*by R***Z on January 6, 2026*

Purchase price.was great. Product really worked for me. I did notice a slight improvement in fuel efficiency and power. Most of all it did aid in engine sound. Do read the pros and cons on the product before using it. Reviews on the product are very informative but do read up on the pros and cons of the product, especially do notice the date of production on item. This is very important.

### ⭐⭐⭐⭐⭐ 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)

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---

*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-03-01*