---
product_id: 47954807
title: "STP GST61300EN Oil Treatment for Diesel Engines 300 ml"
brand: "stp"
price: "154 Lei"
currency: RON
in_stock: true
reviews_count: 12
category: "Stp"
url: https://www.desertcart.ro/products/47954807-stp-gst61300en-oil-treatment-for-diesel-engines-300-ml
store_origin: RO
region: Romania
---

# Reduces engine knocking Boosts engine protection Restores oil additives STP GST61300EN Oil Treatment for Diesel Engines 300 ml

**Brand:** stp
**Price:** 154 Lei
**Availability:** ✅ In Stock

## Summary

> 🛠️ Keep your diesel engine running like new — because smooth rides aren’t just for the elite.

## Quick Answers

- **What is this?** STP GST61300EN Oil Treatment for Diesel Engines 300 ml by stp
- **How much does it cost?** 154 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/47954807-stp-gst61300en-oil-treatment-for-diesel-engines-300-ml)

## Best For

- stp enthusiasts

## Why This Product

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

## Key Features

- • **Silence the Noise:** Effectively stops diesel engine knocking within seconds, delivering a smoother, quieter ride.
- • **Engine Armor Upgrade:** Fortifies motor oil with advanced anti-wear and anti-friction agents for longer engine life.
- • **Shear-Stable Formula:** Prevents diesel fuel dilution, ensuring consistent oil viscosity and optimal engine efficiency.
- • **Acid Neutralizer Boost:** Increases Total Base Number (TBN) to neutralize harmful acids and protect engine internals.
- • **Premium Additive Replenishment:** Replaces burnt-out minerals and additives between oil changes to maintain peak oil performance.

## Overview

STP GST61300EN Oil Treatment is a 300 ml diesel engine additive designed to enhance motor oil with premium detergents, viscosity improvers, and anti-wear agents. It reduces engine noise, replenishes lost additives between oil changes, neutralizes acids, and prevents fuel dilution, ensuring improved engine performance and longevity.

## Description

STP Oil Treatment for Diesel Engines uses an exclusive formula to fortify motor oil with an extra measure of additives, providing increased levels of detergent/dispersant, viscosity improver, anti-wear and anti-friction agents. Specially developed following extensive research and testing, STP Oil Treatment for Diesel Engines has been designed specifically for all diesel engines, providing essential additives found in premium quality diesel engine oils and, when used between oil changes, will replace burnt out minerals and additives in the oil to reduce diesel operating costs. It is ‘shear’ stable to help stop diesel fuel dilution, and also increases Total Base Number (TBN) to neutralise acids. Box Contains 1 x bottle

Review: All good - Quality STP product as usual
Review: Works great - I have a 2019 Vauxhall Grandland X with a noisy engine. I was recommended this as a cheap way to try and fix the issue. I followed the instructions adding this to a warm engine that had time to settle. To my amazement it stopped the noisy knocking engine within about 30 seconds. I have now been running this for a few thousand miles and the engine is smoother and quieter. Definitely worth the money.

## Features

- car parts

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B003H5JU6K |
| Best Sellers Rank | 2,595 in Automotive ( See Top 100 in Automotive ) 13 in Vehicle Oil Additives |
| Brand | STP |
| Customer Reviews | 4.6 4.6 out of 5 stars (593) |
| Date First Available | 14 April 2010 |
| Item Weight | 300 g |
| Item model number | ST61300EN |
| Manufacturer | AutoMotion Factors Limited |
| Manufacturer part number | E302004600 |
| Model | ST61300EN |
| Product Dimensions | 8 x 8 x 14 cm; 300 g |

## Product Details

- **Automotive Fit Type:** Universal Fit
- **Brand:** STP
- **Liquid volume:** 300 Millilitres
- **Package information:** Bottle
- **Vehicle service type:** Bus, Car, Truck, motorbike

## Images

![STP GST61300EN Oil Treatment for Diesel Engines 300 ml - Image 1](https://m.media-amazon.com/images/I/61gIE2tQSxL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: Can i use this in my motorbike that has a wet clutch ?**
A: hi this product thickens engine oil would say it would be too thick to use in a wet clutch I use it in an old car with a worn engine think that is what it does best

**Q: Is good for a6 2009 tdi 2.0l ? Automatic?**
A: I have a 2010 VW 2.00 litre auto and works fine on mine.

**Q: When using this product. Do you need to pour the entire bottle to the engine or half etc?**
A: Hello, First of all run a hot bowl of water and stick the bottle in and leave it for 10 minutes,reason for this its as like a set honey. In answer to your question you use the whole bottle at once preferably in a warmed up engine. Simply poor in where you top up oil and start the engine to allow it to idle for around 5 minutes this will allow it to mix with your oil properly whilst the engine is under minimal load.  It's a great product , hope this helps

**Q: Can I use this on a Diesel engine with a dpf**
A: Yes you can - Has no direct influence on DPF performance. Need a fuel additive for that.

## Customer Reviews

### ⭐⭐⭐⭐⭐ All good
*by M***3 on 28 September 2025*

Quality STP product as usual

### ⭐⭐⭐⭐⭐ Works great
*by G***N on 9 May 2025*

I have a 2019 Vauxhall Grandland X with a noisy engine. I was recommended this as a cheap way to try and fix the issue. I followed the instructions adding this to a warm engine that had time to settle. To my amazement it stopped the noisy knocking engine within about 30 seconds. I have now been running this for a few thousand miles and the engine is smoother and quieter. Definitely worth the money.

### ⭐⭐⭐⭐⭐ Engine oil treatment
*by A***R on 14 January 2026*

I've used this treatment just as a precaution to quiten down my engine works a treat, great seller and product

## Frequently Bought Together

- Stp- 61300En 300Ml Oil Treatment For Diesel Engines
- STP 65148 15 Oz Oil Treatment

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---

*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-03-11*