---
product_id: 360065587
title: "40278 Engine Stop Leak - 946ml"
brand: "lucas oil"
price: "€ 38.21"
currency: EUR
in_stock: true
reviews_count: 11
category: "Lucas Oil"
url: https://www.desertcart.it/products/360065587-40278-engine-stop-leak-946ml
store_origin: IT
region: Italy
---

# Reduces engine noise & oil loss Compatible with all oil types 946ml precision dosing 40278 Engine Stop Leak - 946ml

**Brand:** lucas oil
**Price:** € 38.21
**Availability:** ✅ In Stock

## Summary

> 🛠️ Stop leaks, start winning: Keep your engine flawless and your drive fearless!

## Quick Answers

- **What is this?** 40278 Engine Stop Leak - 946ml by lucas oil
- **How much does it cost?** € 38.21 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/360065587-40278-engine-stop-leak-946ml)

## Best For

- lucas oil enthusiasts

## Why This Product

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

## Key Features

- • **Seal the Deal:** Renews worn engine seals without corrosion risk, keeping your ride leak-free and smooth.
- • **Quiet Confidence:** Dramatically reduces engine noise and oil consumption while boosting oil pressure for peak performance.
- • **Multi-System Magic:** Effective not just for engines but also automatic transmissions and hydraulic systems—versatility that saves time and money.
- • **Safe & Solvent-Free:** Formulated without harmful solvents, protecting your engine’s internals and the environment.
- • **Universal Compatibility:** Works seamlessly with petroleum, semi-synthetic, and full synthetic oils—one solution for every engine.

## Overview

Lucas Oil 40278 Engine Stop Leak is a 946ml advanced additive designed to renew worn engine seals, reduce oil leaks, and lower engine noise. Compatible with all motor oil types and safe for use in transmissions and hydraulic systems, it boosts oil pressure without harmful solvents, ensuring long-lasting engine protection and performance.

## Description

Lucas Engine Oil Stop Leak is an all new formulation of Lucas additives and very specific base stocks designed to stop seal leaks in engines! Use 20% of system capacity (example: 1 litre Lucas Engine Oil Stop Leak to 4 litres of motor oil) Lucas Engine Oil Stop Leak is also effective at stopping leaks in automatic transmissions, hydrostat transmissions or hydraulic systems, 10% is usually adequate.

Review: Great product - It works with my car
Review: Small leak fixed - Had an oil leak on a 2010 Vauxhall Astra 1.6 petrol, was finding small amounts under car being left on ground after driving. After using this I have not had any oil on ground seems to have done the trick, make sure you check label, I only needed half the bottle, so far so good

## Features

- Compatible with petroleum, semi-synthetic and full synthetic motor oils
- Renews worn seals with no risk of damage or eventual corrosion
- Reduces engine noise and oil consumption, while raising oil pressure
- Contains no harmful solvents
- Included components: one bottle
- Compatible with vehicle type: atv

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09DGQ2CVW |
| Best Sellers Rank | 60,237 in Automotive ( See Top 100 in Automotive ) 66 in Engine Oil Additives |
| Brand | Lucas Oil |
| Customer Reviews | 4.4 4.4 out of 5 stars (349) |
| Date First Available | 24 Aug. 2021 |
| Item Weight | 920 g |
| Item model number | 40278 |
| Manufacturer | Lucas Oil Products Inc |
| Manufacturer part number | 40278 |
| Model | Engine Oil Stop Leak |
| Product Dimensions | 8.38 x 8.38 x 29.85 cm; 920 g |
| Viscosity | 0W 20 |

## Product Details

- **Brand:** Lucas Oil
- **Liquid volume:** 0.95 Litres
- **Package information:** Bottle
- **Vehicle service type:** ATV, Car, Lawn Mower, Scooter, Truck
- **Viscosity:** 0W 20

## Images

![40278 Engine Stop Leak - 946ml - Image 1](https://m.media-amazon.com/images/I/71m3Xsuyy4L.jpg)

## Questions & Answers

**Q: Is this ok for 1.4 diesel fiesta 2011**
A: As long as you are using semi synthetic or fully synthetic oil in your Fiesta as stated by Lucas then it should be fine to use.

**Q: How much of this should be added to the oil?**
A: We recommend a 20% treat rate for example - 1 Litre additive + 4 Litres of oil. Thank you.

**Q: Is this ok for diesel vehicle**
A: Perfect for diesel engines I've used this product the last 3-years in my 2L D4D engine and my engine is superb it was an old 150000 mile engine with white smoke coming out the back if you idled now there is no smoke and no loud noises coming from the engine run smoothly with no smoke

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great product
*by F***I on 9 November 2025*

It works with my car

### ⭐⭐⭐⭐⭐ Small leak fixed
*by M***N on 5 June 2023*

Had an oil leak on a 2010 Vauxhall Astra 1.6 petrol, was finding small amounts under car being left on ground after driving. After using this I have not had any oil on ground seems to have done the trick, make sure you check label, I only needed half the bottle, so far so good

### ⭐⭐⭐⭐ Great
*by J***� on 5 January 2026*

Did the job

## Frequently Bought Together

- Lucas Oil 40278 Engine Stop Leak - 946ml
- Lucas Oil 40001 Heavy Duty Oil Stabilizer-1L
- Lucas Oil 40016 Complete Engine Treatment-473ml

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-02-18*