---
product_id: 689552563
title: "Mannol 9990 Motor Doctor Piston Ring and Engine Oil Additive - 350 ml"
brand: "mannol"
price: "€ 5.90"
currency: EUR
in_stock: true
reviews_count: 6
category: "Mannol"
url: https://www.desertcart.pt/products/689552563-mannol-9990-motor-doctor-piston-ring-and-engine-oil-additive
store_origin: PT
region: Portugal
---

# Reduces engine smoke by 40% Boosts oil pressure +15% Extends engine life up to 30% Mannol 9990 Motor Doctor Piston Ring and Engine Oil Additive - 350 ml

**Brand:** mannol
**Price:** € 5.90
**Availability:** ✅ In Stock

## Summary

> 🛠️ Unlock your engine’s hidden potential—drive smarter, not harder!

## Quick Answers

- **What is this?** Mannol 9990 Motor Doctor Piston Ring and Engine Oil Additive - 350 ml by mannol
- **How much does it cost?** € 5.90 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/689552563-mannol-9990-motor-doctor-piston-ring-and-engine-oil-additive)

## Best For

- mannol enthusiasts

## Why This Product

- Trusted mannol brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Engine Armor:** Forms a durable lubricant film that protects engine parts, ensuring peak performance under stress.
- • **Revive & Thrive:** Restores worn engines by increasing oil pressure and cutting oil consumption, saving you costly repairs.
- • **Smoke-Free Drive:** Prevents oil leakage into combustion chambers, slashing soot and engine smoke for a cleaner ride.
- • **Cold Start Champion:** Guarantees smooth, problem-free cold starts even in harsh conditions—never miss a beat.
- • **Universal Compatibility:** Expertly formulated to blend seamlessly with both synthetic and mineral oils for versatile use.

## Overview

Mannol 9990 Motor Doctor is a premium 350 ml synthetic oil additive designed to boost oil pressure, reduce oil consumption, and prevent engine smoke in both worn and new engines. It forms a protective lubricant film that enhances engine durability, ensures flawless operation under tough conditions, and supports smooth cold starts. Compatible with synthetic and mineral oils, this German-engineered formula is a top-rated solution for prolonging engine life and optimizing performance.

## Description

Increases oil pressure and decreases oil consumption in worn out engines.

Review: Love it - I love the product but agin and agin
Review: Un gran aditivo - Buen aditivo ..servicio de entrega muy rápido

## Features

- Increases oil pressure and decreases oil consumption in worn out engines.
- Prevents oil from getting into the combustion chamber and opposes the formation of soot and engine smoke.
- Prolongs new engine's life and forms a reliable lubricant film on the engine parts.
- Ensures flawless engine functionality under hard conditions and guarantees problem-free cold starts.
- Suitably mixed with synthetic and mineral oils.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00ZPO6UFK |
| Best Sellers Rank | #1,104 in Automotive ( See Top 100 in Automotive ) #16 in Oil & Fluid Additives |
| Brand | MANNOL |
| Brand Name | MANNOL |
| Container Type | Can |
| Country of Origin | Germany |
| Customer Reviews | 4.6 out of 5 stars 277 Reviews |
| Item Form | Oil |
| Item Weight | 308 Grams |
| Item weight | 308 Grams |
| Liquid Volume | 300 Milliliters |
| Liquid volume | 300 Milliliters |
| Manufacturer | Mannol |
| Material | Synthetic |
| Model Number | MN9990-030ME |
| Number of Items | 1 |
| Number of Packs | 1 |
| Package information | Can |
| Part Number | MN9990-030ME |
| Recommended Uses For Product | Internal Combustion Engines |
| Recommended uses for product | Internal Combustion Engines |
| SAE J300 Viscosity Grade | 5W-30 |
| Specific Uses For Product | Suitable for Worn Out and New Engines |
| Unit Count | 350 Milliliters |
| Viscosity | 5w-30 |

## Product Details

- **Brand:** MANNOL
- **Item weight:** 308 Grams
- **Liquid volume:** 300 Milliliters
- **Material:** Synthetic
- **Package information:** Can

## Images

![Mannol 9990 Motor Doctor Piston Ring and Engine Oil Additive - 350 ml - Image 1](https://m.media-amazon.com/images/I/81fM1y4O-WL.jpg)
![Mannol 9990 Motor Doctor Piston Ring and Engine Oil Additive - 350 ml - Image 2](https://m.media-amazon.com/images/I/81P1nLVDIxL.jpg)
![Mannol 9990 Motor Doctor Piston Ring and Engine Oil Additive - 350 ml - Image 3](https://m.media-amazon.com/images/I/91Y7m5bABmL.jpg)
![Mannol 9990 Motor Doctor Piston Ring and Engine Oil Additive - 350 ml - Image 4](https://m.media-amazon.com/images/I/814iWvM12kL.jpg)
![Mannol 9990 Motor Doctor Piston Ring and Engine Oil Additive - 350 ml - Image 5](https://m.media-amazon.com/images/I/81iEcKKhcTL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Love it
*by G***M on 15 August 2026*

I love the product but agin and agin

### ⭐⭐⭐⭐⭐ Un gran aditivo
*by D***L on 21 April 2026*

Buen aditivo ..servicio de entrega muy rápido

### ⭐⭐⭐⭐⭐ Prima product
*by M***N on 30 October 2024*

Ik heb een oudere auto met heel wat kilometers op de teller. Door slijtage was er frictie tussen verschillende motoronderdelen. Ik deed een blikje Mannol in het oliereservoir terwijl de motor nog warm was en sindsdien voel en hoor ik het verschil. Door de hogere viscositeit verbruikt de wagen nu ook beduidend minder olie.

## Frequently Bought Together

- Mannol Motor Oil Additive
- LIQUI MOLY Valve Clean | 150 ml | Petroladititive | SKU: 2001, Blue

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**Shop now:** [https://www.desertcart.pt/products/689552563-mannol-9990-motor-doctor-piston-ring-and-engine-oil-additive](https://www.desertcart.pt/products/689552563-mannol-9990-motor-doctor-piston-ring-and-engine-oil-additive)

---

*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-10-11*