---
product_id: 55103063
title: "GST60300EN12 Oil Treatment for Petrol Engines 300 ml"
brand: "stp"
price: "$34.60"
currency: USD
in_stock: true
reviews_count: 8
category: "Stp"
url: https://www.desertcart.us/products/55103063-gst60300en12-oil-treatment-for-petrol-engines-300-ml
store_origin: US
region: United States of America
---

# boosts oil viscosity & heat resistance 300 ml universal fit anti-wear, anti-friction, anti-oxidation GST60300EN12 Oil Treatment for Petrol Engines 300 ml

**Brand:** stp
**Price:** $34.60
**Availability:** ✅ In Stock

## Summary

> 🛠️ Keep your engine young, strong, and unstoppable!

## Quick Answers

- **What is this?** GST60300EN12 Oil Treatment for Petrol Engines 300 ml by stp
- **How much does it cost?** $34.60 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/55103063-gst60300en12-oil-treatment-for-petrol-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

- • **Viscosity Enhancer:** Fortifies oil to maintain optimal thickness, improving oil pressure and reducing consumption.
- • **Heat Shield Formula:** Protects engine components from high temperatures for extended oil life.
- • **Proudly UK Made Quality:** Trusted Armor All brand ensuring premium performance and reliability.
- • **Engine Longevity Booster:** Reduces deposits to keep vital engine parts cleaner and running smoother.
- • **Classic Car’s Best Friend:** Perfect for older petrol engines needing extra protection and lubrication.

## Overview

STP GST60300EN12 Oil Treatment is a 300 ml mineral oil additive designed for petrol engines, enhancing oil viscosity and providing superior anti-wear, anti-friction, and anti-oxidation protection. Ideal for older engines, it reduces deposits, lowers oil consumption, and helps maintain engine performance between oil changes. Made in the UK by Armor All, it’s a trusted solution for extending engine life and reliability.

## Description

STP Oil Treatment for Petrol Engines fortifies motor oil with an extra measure of additives, providing increased levels of viscosity improver plus anti-wear, anti-friction and anti-oxidation agents. STP Oil Treatment for Petrol Engines, a mineral oil based additive, provides extra protection against engine heat and allows oil to maintain key lubricating properties for longer to keep the engine going strong until the next oil change.

Review: Perfect for older simpler engines - I use this in a Ford Capri 2.0 to add a bit of extra zddp to the oil to protect the camshaft. Plus the engine has done 100k miles, so the extra viscosity keeps the oil pressure healthy. It may just be my imagination, but I'm sure the car runs quieter and cooler with this in. I add it to the 10w/40 semi-synthetic oil Ford originally recommended for Pinto engines, and it seems to alter the viscosity to approximately that of a 15w/50 or 20w/50, judging by the oil pressure gauge (and how it flows when I drain it). All in all brilliant for a classic engine, but probably not a good idea to put it in a post-millennial vehicle.
Review: STP GST60300EN12 Oil treatment for petrol engines (300ml) - As servicing mileage is increasing anywhere between 10,000m ~ 20,000m to support your synthetic or mineral oil--I would recommend using STP after every service to improve it's viscosity !! The best way of using it is to boil a saucepan open the STP bottle & let it simmer for about 10 minutes so that the STP is liquid & easier to pour into the engine without wasting any STP is also excellent for older engines where parts are beginning to wear & need better lubrication particularly valve guides & big-end assembly

## Features

- What You'll Get - 300 ml Oil Treatment for Petrol Engines
- Reduces engine deposits, keeping vital engine parts cleaner
- Provides extra engine protection
- Reduces oil consumption
- Proudly made in the UK

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0057VT5LC |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | 100,562 in Automotive ( See Top 100 in Automotive ) 123 in Vehicle Oil Additives |
| Brand | STP |
| Brand Name | STP |
| Compatible with Vehicle Type | Car |
| Container Type | Bottle |
| Customer Reviews | 4.6 out of 5 stars 139 Reviews |
| Global Trade Identification Number | 05018704350111 |
| Item Type Name | 33183 |
| Item Weight | 240 g |
| Item height | 5.51 centimetres |
| Liquid Volume | 300 Millilitres |
| Liquid volume | 300 Millilitres |
| Manufacturer | Armor All |
| Manufacturer Part Number | GST60300EN12 |
| Package information | Bottle |
| Unit Count | 300.0 millilitre(s) |
| Vehicle service type | Car |
| Viscosity | 5W-30 sae_grade |

## Product Details

- **Viscosity:** 5W-30 sae_grade
- **Brand:** STP
- **Liquid volume:** 300 Millilitres
- **Package information:** Bottle
- **Vehicle service type:** Car

## Images

![GST60300EN12 Oil Treatment for Petrol Engines 300 ml - Image 1](https://m.media-amazon.com/images/I/61kWxccEiFL.jpg)

## 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

### ⭐⭐⭐⭐⭐ Perfect for older simpler engines
*by H***? on 15 October 2017*

I use this in a Ford Capri 2.0 to add a bit of extra zddp to the oil to protect the camshaft. Plus the engine has done 100k miles, so the extra viscosity keeps the oil pressure healthy. It may just be my imagination, but I'm sure the car runs quieter and cooler with this in. I add it to the 10w/40 semi-synthetic oil Ford originally recommended for Pinto engines, and it seems to alter the viscosity to approximately that of a 15w/50 or 20w/50, judging by the oil pressure gauge (and how it flows when I drain it). All in all brilliant for a classic engine, but probably not a good idea to put it in a post-millennial vehicle.

### ⭐⭐⭐⭐⭐ STP GST60300EN12 Oil treatment for petrol engines (300ml)
*by G***8 on 6 November 2021*

As servicing mileage is increasing anywhere between 10,000m ~ 20,000m to support your synthetic or mineral oil--I would recommend using STP after every service to improve it's viscosity !! The best way of using it is to boil a saucepan open the STP bottle & let it simmer for about 10 minutes so that the STP is liquid & easier to pour into the engine without wasting any STP is also excellent for older engines where parts are beginning to wear & need better lubrication particularly valve guides & big-end assembly

### ⭐⭐⭐⭐ A good product
*by A***R on 8 March 2025*

Rather smaller than what I expected

## Frequently Bought Together

- STP GST60300EN12 Oil Treatment for Petrol Engines 300 ml
- STP Ultra 5 in 1 Petrol System Cleaner 400ml, Restores Power and Protects your Engine, Enhances Fuel Economy, Mechanical Car Cleaning Products, Concentrated Cleaning Formula, Made in the UK

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.us/products/55103063-gst60300en12-oil-treatment-for-petrol-engines-300-ml](https://www.desertcart.us/products/55103063-gst60300en12-oil-treatment-for-petrol-engines-300-ml)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-17*