---
product_id: 7341352
title: "GTX High Mileage 20W-50 Synthetic Blend Motor Oil, 5 Quarts"
brand: "castrol"
price: "¥23730"
currency: JPY
in_stock: true
category: "Castrol"
url: https://www.desertcart.jp/products/7341352-gtx-high-mileage-20w-50-synthetic-blend-motor-oil-5
store_origin: JP
region: Japan
---

# Improved Fuel Economy Boost Phosphorus Replacement Tech for Emission Protection 20W-50 Synthetic Blend Viscosity GTX High Mileage 20W-50 Synthetic Blend Motor Oil, 5 Quarts

**Brand:** castrol
**Price:** ¥23730
**Availability:** ✅ In Stock

## Summary

> 🛢️ Keep your high-mileage ride running like new — because your engine deserves the best!

## Quick Answers

- **What is this?** GTX High Mileage 20W-50 Synthetic Blend Motor Oil, 5 Quarts by castrol
- **How much does it cost?** ¥23730 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/7341352-gtx-high-mileage-20w-50-synthetic-blend-motor-oil-5)

## 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

- • **Sludge & Wear Warrior:** Superior dispersancy fights sludge buildup and advanced additives prevent engine wear.
- • **Emission System Guardian:** Phosphorus Replacement Technology protects catalytic converters and extends emission system life.
- • **Fuel Efficiency Enhancer:** Optimized formula improves fuel economy compared to industry standards.
- • **Engine Longevity Champion:** Formulated for vehicles with 75,000+ miles to extend engine life and performance.
- • **Leak-Reducing Seal Conditioner:** Innovative seal conditioners help reduce leaks, keeping your engine cleaner longer.

## Overview

Castrol GTX High Mileage 20W-50 Synthetic Blend Motor Oil is engineered for vehicles with over 75,000 miles, delivering superior protection against sludge, wear, and leaks. Featuring Phosphorus Replacement Technology, it safeguards emission systems while enhancing fuel economy. This 5-quart bottle meets or exceeds API SP/SN PLUS/SN/SM standards, making it a trusted choice for prolonging engine life and performance.

## Description

Castrol® GTX® High Mileage 20W-50 is 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.

## 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 | * Based on API and ACEA volatility specifications | ** In 5W-20, 5W-30 and 10W-30 grades versus industry specifications

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00JGQLU5S |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #2,463 in Automotive ( See Top 100 in Automotive ) #48 in Motor Oils |
| 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 4.8 out of 5 stars (2,705) |
| Global Trade Identification Number | 00079191231128 |
| Included Components | Motor Oil |
| Item Type Name | Motor Oil |
| Liquid Volume | 160 fluid ounces |
| Manufacturer | Castrol |
| Manufacturer Part Number | 1597C3 |
| Manufacturer Warranty Description | 12 Months |
| Model Number | 1597C3 |
| Number of Packs | 1 |
| SAE J300 Viscosity Grade | 20W-50 |
| Size | 5 Quarts |
| UPC | 079191231128 |
| Unit Count | 160 Fluid Ounces |
| Viscosity Level | Medium to High |

## Product Details

- **Brand:** Castrol
- **Liquid Volume:** 160 fluid ounces
- **Package Information:** Bottle
- **SAE J300 Viscosity Grade:** 20W-50
- **Vehicle Service Type:** For use in vehicles with over 75,000 miles, Passenger cars, trucks, and SUVs

## Images

![GTX High Mileage 20W-50 Synthetic Blend Motor Oil, 5 Quarts - Image 1](https://m.media-amazon.com/images/I/61JBp5iXExL.jpg)

## Available Options

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

## Questions & Answers

**Q: Buenos dias, cual es la medida de la caja con los dos productos?**
A: Las dimensiones de la caja son ‎11.8 x 9.5 x 4.6 pulgadas

**Q: Es lo mismo al semisintetico?**
A: Si. Castrol GTX High Mileage contiene una mezcla de aceites de base sintética y de base convencional.

**Q: Is this thicker oil harder on the oil pump on a car with 280k miles ?**
A: I don't believe this oil should have any effect on the pump simply because of the synthetics in the oil. But why would you want to put that heavy oil in a car unless you use the car real hard or are trying to prolong a problem. I had a 2000 Accord which I bought in 2006 with thirty thousand miles on it. I recently sold the Accord and it had 218,000 miles on it and never used a 20/50 oil. My car still with regular oil changes and routine maintenance checks ran perfect. It never used a drop of oil between oil changes and I have always used Castrol oil in my cars for over 40 years and never had a problem. I always used the 10/30 or 10/40 regular oil and then when I reached the 100,000 mile mark I used the 10/30 or 10/40 high mileage

**Q: Is this product safe?**
A: Castrol GTX High Mileage has a new and improved formula specifically formulated for vehicles with over 75,000 miles however the product still provides the same great engine protection against sludge, oil burn-off and seal protection as the previous formula.

Castrol GTX High Mileage is a premium synthetic blend motor oil formulated with Phosphorus Replacement Technology, which is a unique, patented, and proprietary additive developed by the Castrol Technology Group. This technology enables the use of significantly lower levels of phosphorus, which helps prevent catalytic converter and emission system failure better than conventional and other high-mileage oils that contain higher phosphorus levels.

Although the amount of phosphorus is reduced, Castrol GTX High Mileage is able to maintain an excellent level of wear protection based upon industry wear tests and provides superior performance in other tests compared to industry standards. This ensures that higher-mileage vehicles using GTX High Mileage are well protected against engine wear, deposits, sludge and other potential issues.

The new Castrol GTX High Mileage formula is available in 5W-20, 5W-30, 10W-30 and 10W-40; a new 20W-50 formula will be available later this year. All grades are API SN; the 5W-20, 5W-30 and 10W-30 grades are also ILSAC GF-5. 

Castrol Consumer Relations

## Frequently Bought Together

- Castrol GTX High Mileage 20W-50 Synthetic Blend Motor Oil, 5 Quarts
- K&N Motorcycle Oil Filter: High Performance, Premium, Designed to be used with Synthetic or Conventional Oils, Wrench Off Nut: Fits Select Harley Davidson, Buell Motorcycles, KN-171C

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-10-15*