---
product_id: 689552563
title: "Mannol 9990 Motor Doctor Piston Ring and Engine Oil Additive - 350 ml"
brand: "mannol"
price: "S$11"
currency: SGD
in_stock: true
reviews_count: 5
category: "Mannol"
url: https://www.desertcart.sg/products/689552563-mannol-9990-motor-doctor-piston-ring-and-engine-oil-additive
store_origin: SG
region: Singapore
---

# Reduces engine smoke & soot by 30% Boosts oil pressure +15% Compatible with synthetic & mineral oils Mannol 9990 Motor Doctor Piston Ring and Engine Oil Additive - 350 ml

**Brand:** mannol
**Price:** S$11
**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?** S$11 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/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

- • **Smoke-Free Drive:** Say goodbye to engine smoke and soot with advanced combustion chamber protection.
- • **Engine Revival Power:** Revitalize worn engines by increasing oil pressure and cutting oil consumption.
- • **Extended Engine Life:** Forms a durable lubricant film that prolongs your engine’s peak performance.
- • **Cold Start Confidence:** Guarantees smooth, problem-free cold starts even under harsh conditions.
- • **Universal Oil Compatibility:** Seamlessly blends with both synthetic and mineral oils for versatile use.

## Overview

Mannol 9990 Motor Doctor is a 350 ml synthetic oil additive designed to boost oil pressure, reduce oil consumption, and prevent soot formation in both new and worn engines. Compatible with synthetic and mineral oils, it ensures flawless engine performance, especially during cold starts, while extending engine life and reducing harmful emissions.

## Description

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

Review: Excellent - Excellent
Review: Prima product - 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.

## 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 | #4,331 in Automotive ( See Top 100 in Automotive ) #42 in Oil & Fluid Additives |
| Brand | MANNOL |
| Brand Name | MANNOL |
| Container Type | Can |
| Customer Reviews | 4.6 out of 5 stars 255 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 |
| 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)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent
*by D***S on 8 May 2026*

Excellent

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ المنتج كما ف الوصف
*by W***Y on 5 February 2024*

تحت التجربة _المنتج وصل كما ف الصور..سعر جيد..شكرا امازون .. التوصيل سريع

## 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.sg/products/689552563-mannol-9990-motor-doctor-piston-ring-and-engine-oil-additive](https://www.desertcart.sg/products/689552563-mannol-9990-motor-doctor-piston-ring-and-engine-oil-additive)

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-07-21*