---
product_id: 5995797
title: "Castrol GTX High Mileage 10W-30 Synthetic Blend Motor Oil, 5 Quarts"
brand: "castrol"
price: "$220"
currency: NZD
in_stock: true
reviews_count: 8
category: "Castrol"
url: https://www.desertcart.nz/products/5995797-castrol-gtx-high-mileage-10w-30-synthetic-blend-motor-oil
store_origin: NZ
region: New Zealand
---

# Superior Oil Burn-Off Protection Phosphorus Replacement Tech for Emission Protection 10W-30 Synthetic Blend Viscosity Castrol GTX High Mileage 10W-30 Synthetic Blend Motor Oil, 5 Quarts

**Brand:** castrol
**Price:** $220
**Availability:** ✅ In Stock

## Summary

> 🛢️ Keep your high-mileage engine young, efficient, 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?** $220 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/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

- • **Fuel Economy Enhancer:** Improved additives help optimize fuel efficiency, saving you money on every mile.
- • **Sludge & Leak Fighter:** Advanced dispersants and seal conditioners combat sludge buildup and minimize leaks for peak engine health.
- • **Emission System Guardian:** Phosphorus Replacement Technology protects catalytic converters, keeping your ride eco-friendly and compliant.
- • **Engine Longevity Booster:** Specially formulated for vehicles with 75,000+ miles to extend engine life and reduce wear.
- • **Industry-Leading Standards:** Meets or exceeds API SP/SN PLUS and ILSAC GF-6 specs, ensuring top-tier performance and protection.

## Overview

Castrol GTX High Mileage 10W-30 Synthetic Blend Motor Oil is engineered for vehicles with over 75,000 miles, delivering superior protection against engine wear, sludge, and leaks. Featuring Phosphorus Replacement Technology, it safeguards emission systems while enhancing fuel economy. Trusted by millions, it meets the latest industry standards to keep your engine running smoother, longer.

## 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 |
| Best Sellers Rank | #2,942 in Automotive ( See Top 100 in Automotive ) #58 in Motor Oils |
| Brand | Castrol |
| Brand Name | Castrol |
| Compatible with Vehicle Type | For use in vehicles with over 75,000 miles, Passenger cars, trucks, and SUVs |
| Container Type | Bottle |
| Customer Reviews | 4.8 out of 5 stars 3,219 Reviews |
| Global Trade Identification Number | 00079191231104 |
| Included Components | Motor Oil |
| Item Height | 4.5 inches |
| Item Type Name | Motor Oil |
| Liquid Volume | 160 Fluid Ounces |
| Manufacturer | Castrol |
| Manufacturer Part Number | 03110C |
| Manufacturer Warranty Description | 12 Months |
| Package Information | Bottle |
| UPC | 079191231104 |
| Unit Count | 160.0 Fluid Ounces |
| Vehicle Service Type | For use in vehicles with over 75,000 miles, Passenger cars, trucks, and SUVs |
| Viscosity | 10W 30 SAE Grade |

## Product Details

- **Viscosity:** 10W 30 SAE Grade
- **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

## 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

### ⭐⭐⭐⭐⭐ its good stuff .crown vic 2010 police car
*by R***E on September 20, 2025*

been using for years never blew an engine yet had many cars

## 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 New Zealand*
*Store origin: NZ*
*Last updated: 2026-01-26*