---
product_id: 5995797
title: "Castrol GTX High Mileage 10W-30 Synthetic Blend Motor Oil, 5 Quarts"
brand: "castrol"
price: "€ 64.01"
currency: EUR
in_stock: true
reviews_count: 12
category: "Castrol"
url: https://www.desertcart.ie/products/5995797-castrol-gtx-high-mileage-10w-30-synthetic-blend-motor-oil
store_origin: IE
region: Ireland
---

# Improves fuel economy Phosphorus Replacement Tech for emission system longevity Superior engine wear protection Castrol GTX High Mileage 10W-30 Synthetic Blend Motor Oil, 5 Quarts

**Brand:** castrol
**Price:** € 64.01
**Availability:** ✅ In Stock

## Summary

> 🛢️ Keep your high-mileage ride young and unstoppable!

## Quick Answers

- **What is this?** Castrol GTX High Mileage 10W-30 Synthetic Blend Motor Oil, 5 Quarts by castrol
- **How much does it cost?** € 64.01 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/5995797-castrol-gtx-high-mileage-10w-30-synthetic-blend-motor-oil)

## Best For

- castrol enthusiasts

## Why This Product

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

## Key Features

- • **Burn Less, Drive More:** Exceptional oil burn-off protection exceeds industry standards, saving you money and hassle.
- • **Seal the Deal on Leaks:** Advanced seal conditioners reduce leaks, keeping your engine running smoothly and efficiently.
- • **Fight Sludge Like a Pro:** Superior dispersancy formula keeps your engine cleaner by preventing sludge buildup.
- • **Drive Smarter, Not Harder:** Improved fuel economy with every mile, engineered for vehicles with over 75,000 miles.
- • **Extend Your Engine’s Life:** Phosphorus Replacement Technology protects catalytic converters and emission systems for high-mileage vehicles.

## Overview

Castrol GTX High Mileage 10W-30 Synthetic Blend Motor Oil is specially formulated for vehicles with over 75,000 miles, featuring Phosphorus Replacement Technology to protect emission systems, superior sludge-fighting dispersants, and advanced additives that reduce leaks and engine wear. This oil exceeds industry standards for burn-off protection and improves fuel economy, making it the #1 consumer choice for high-mileage engine care.

## Description

Castrol® GTX® High Mileage 10W-30 is the #1 consumer high-mileage brand, specially formulated for vehicles with over 75,000 miles. It's a synthetic blend motor oil that helps extend engine life providing Superior Protection in 7 Critical Areas including corrosion prevention, sludge control, timing and friction wear. It also contains a proprietary additive to protect the emisssion system. Our Phosphorus Replacement Technology reduces harmful phosphorus to protect the catalytic converter and help extend the life of your high mileage vehicle.

Review: Castrol high mileage oil - Works great. All of my vehicles are older so I use high mileage oil. The Castrol is a good choice.
Review: Fair price - Good quality product

## Features

- Phosphorus Replacement Technology helps extend emission system life
- Superior dispersancy that fights sludge build up
- Exceptional oil burn-off protection exceeding industry standards* | Seal conditioners to help reduce leaks
- Advanced additives that help prevent engine wear | Improved Fuel Economy**
- Meets or exceeds the following specifications: API SP/SN PLUS/SN/SM | ILSAC GF-6 | * Based on API and ACEA volatility specifications ** In 5W-20, 5W-30 and 10W-30 grades versus industry specifications

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00GSX43WE |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #1,774 in Automotive ( See Top 100 in Automotive ) #38 in Motor Oils |
| Brand | Castrol |
| Customer Reviews | 4.8 4.8 out of 5 stars (3,264) |
| Date First Available | April 4, 2014 |
| Global Trade Identification Number | 00079191231104 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 9.43 pounds |
| Item model number | 03110 |
| Manufacturer | Castrol |
| Manufacturer Part Number | 03110C |
| Model | 03110 |
| Product Dimensions | 11.9 x 9.5 x 4.5 inches |
| SAE J300 Viscosity Grade | 10W-30 |
| Size | 5 Quarts |
| UPC | 079191231104 |
| Vehicle Service Type | For use in vehicles with over 75,000 miles, Passenger cars, trucks, and SUVs |
| Viscosity | 10W 30 SAE Grade |

## Product Details

- **Brand:** Castrol
- **Liquid Volume:** 160 Fluid Ounces
- **Package Information:** Bottle
- **Vehicle Service Type:** For use in vehicles with over 75,000 miles, Passenger cars, trucks, and SUVs
- **Viscosity:** 10W 30 SAE Grade

## Images

![Castrol GTX High Mileage 10W-30 Synthetic Blend Motor Oil, 5 Quarts - Image 1](https://m.media-amazon.com/images/I/61-CIrwlB6L.jpg)

## Available Options

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

## Questions & Answers

**Q: Is this oil used for inboard Mercruiser?**
A: Castrol does not recommend using passenger car engine oils like Castrol GTX High Mileage 10W-30 in marine applications.

At this time, Castrol does NOT offer 4-stroke marine oil or NMMA certified engine oil therefore Castrol GTX High Mileage 10W-30 would NOT be recommended for use in a Mercruiser Inboard.

**Q: Can I use this oil in my zero turn mower john deere says 10W-30**
A: This is a blended half synthetic, if your engine requires 10W 30 this will work.
The purely synthetic oil is very thin and can find a leak in machinery very quickly.
This in my 95 YJ has performed well.

**Q: For the 10w30 synthetic blend or semi synthetic blend do you have to use a regular oil filter or synthetic oil filter?**
A: regular oil filter

**Q: How is this quality?**
A: Castrol motor oil is quality without question.
I have several cars some oil and some new . I use it in all of them.
The high mileage oil truly helps the cars with high mileage.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Castrol high mileage oil
*by D***F on December 28, 2025*

Works great. All of my vehicles are older so I use high mileage oil. The Castrol is a good choice.

### ⭐⭐⭐⭐⭐ Fair price
*by J***. on October 23, 2025*

Good quality product

### ⭐⭐⭐⭐⭐ Castrol GTX Motor Oil
*by J***T on February 9, 2026*

Great Itiem and Fast Shipping

## Frequently Bought Together

- Castrol GTX High Mileage 10W-30 Synthetic Blend Motor Oil, 5 Quarts
- FRAM Extra Guard PH7317, 10K Mile Change Automotive Replacement Interval Spin-On Engine Oil Filter for Select Vehicle Models
- FRAM Extra Guard PH3614, 10K Mile Change Automotive Replacement Interval Spin-On Engine Oil Filter for Select Vehicle Models

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-18*