---
product_id: 6635153
title: "50504 MT-85 Manual Transmission 75W85 GL-4 Gear Oil - 1 Quart"
brand: "red line"
price: "€ 67.92"
currency: EUR
in_stock: true
reviews_count: 12
category: "Red Line"
url: https://www.desertcart.gr/products/6635153-50504-mt-85-manual-transmission-75w85-gl-4-gear-oil
store_origin: GR
region: Greece
---

# Faster, smoother gear shifts 75W85 GL-4 viscosity grade Safe for brass synchros 50504 MT-85 Manual Transmission 75W85 GL-4 Gear Oil - 1 Quart

**Brand:** red line
**Price:** € 67.92
**Availability:** ✅ In Stock

## Summary

> ⚙️ Shift smarter, not harder — gear oil that means business!

## Quick Answers

- **What is this?** 50504 MT-85 Manual Transmission 75W85 GL-4 Gear Oil - 1 Quart by red line
- **How much does it cost?** € 67.92 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/6635153-50504-mt-85-manual-transmission-75w85-gl-4-gear-oil)

## Best For

- red line enthusiasts

## Why This Product

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

## Key Features

- • **Brass Synchro Safe:** No reactive sulfurs to damage sensitive components
- • **Effortless Shifting:** Balanced friction control for silky smooth gear changes, even in cold weather
- • **Legacy of Performance:** Red Line’s proven formula since 1979—no compromises on quality
- • **Trusted Compatibility:** Ideal for Nissan 350Z/370Z, Mitsubishi Evo, Hyundai, Kia & Quaife manuals
- • **Precision Gear Protection:** Extends synchro life with advanced GL-4 formula

## Overview

Red Line 50504 MT-85 is a premium 75W85 GL-4 manual transmission gear oil designed to protect gears and extend synchro life. Its unique formula ensures quicker, smoother shifts with balanced friction control, safe for brass synchros, and compatible with popular performance and daily driver manuals like Nissan 350Z/370Z and Mitsubishi Evolution. Trusted since 1979, it delivers uncompromising performance for discerning drivers.

## Description

Buy Red Line 50504 MT-85 Manual Transmission 75W85 GL-4 Gear Oil - 1 Quart: Motor Oils - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Solid MTF - Pretty smooth shifting
Review: Good Stuff! - Used a little over 2 quarts swapping out from a small 5-speed transmission. Works great and just clicks into gear.

## Features

- HIGH PERFORMANCE - Gear protection and longer synchro life. Recommended for GL-1, GL-3, and GL-4 applications, as well as where most special synchromesh fluids are specified
- OFFERS QUICKER SHIFTS - Excellent gear and synchro protection, balanced friction control & slipperiness for easier shifting even in cold climates
- SAFE FOR BRASS SYNCHROS - GL-4 Gear Oil lacks the reactive sulfurs found in most GL-5 oils that cause damage. Recommended for GL-1, GL-3 & GL-4 applications
- POPULAR GEA OIL FOR - Nissan 350Z and 370Z (also most Maxima, Altima & Sentra), Mitsubishi Evolution, Hyundai, Kia and Quaife synchro manual trans applications
- WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004D4URV6 |
| Best Sellers Rank | #19,134 in Automotive ( See Top 100 in Automotive ) #276 in Motor Oils |
| Brand | Red Line |
| Date First Available | November 19, 2010 |
| Global Trade Identification Number | 00083522505048 |
| Is Discontinued By Manufacturer | No |
| Item Form | Fluids,Oil |
| Item Weight | 1.95 pounds |
| Item model number | RED50504 |
| Liquid Volume | 32 Fluid Ounces |
| Manufacturer | Red Line |
| Material | Mineral Oil, Synthetic Oil |
| Number of Items | 1 |
| Package Information | Bottle |
| Product Dimensions | 13 x 6 x 6 inches |
| Recommended Uses For Product | Vehicle |
| UPC | 083522505048 |
| Unit Count | 32.0 Fluid Ounces |
| Viscosity | 5w-30 |

## Product Details

- **Brand:** Red Line
- **Item Weight:** 1.95 Pounds
- **Liquid Volume:** 32 Fluid Ounces
- **Material:** Mineral Oil, Synthetic Oil
- **Package Information:** Bottle

## Images

![50504 MT-85 Manual Transmission 75W85 GL-4 Gear Oil - 1 Quart - Image 1](https://m.media-amazon.com/images/I/41UzjMuptmL.jpg)
![50504 MT-85 Manual Transmission 75W85 GL-4 Gear Oil - 1 Quart - Image 2](https://m.media-amazon.com/images/I/41b7z79z2UL.jpg)
![50504 MT-85 Manual Transmission 75W85 GL-4 Gear Oil - 1 Quart - Image 3](https://m.media-amazon.com/images/I/51+d-ugfJvL.jpg)
![50504 MT-85 Manual Transmission 75W85 GL-4 Gear Oil - 1 Quart - Image 4](https://m.media-amazon.com/images/I/512ViBe7LBL.jpg)
![50504 MT-85 Manual Transmission 75W85 GL-4 Gear Oil - 1 Quart - Image 5](https://m.media-amazon.com/images/I/51XVepoDWcL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Solid MTF
*by D***W on December 9, 2025*

Pretty smooth shifting

### ⭐⭐⭐⭐⭐ Good Stuff!
*by B***G on January 21, 2026*

Used a little over 2 quarts swapping out from a small 5-speed transmission. Works great and just clicks into gear.

### ⭐⭐⭐⭐⭐ Smooth shifts and good quality.
*by Z***S on October 11, 2025*

2017 Cruze diesel 6 speed manual. Feels great much better than the oem fluid after 65k miles. Smooth shifts no resistance even when it was 30degrees.

## Frequently Bought Together

- Red Line 50504 MT-85 Manual Transmission 75W85 GL-4 Gear Oil - 1 Quart
- Red Line 50504 MT-85 Manual Transmission 75W85 GL-4 Gear Oil - 1 Quart (4 Pack)
- Slippery Pete - Fluid Pump for Standard Quart Bottles - 8cc per Pump Stroke and 3rd Hand Adapter, Transfer Gear Oil, Transmission and Differential Fluid (28mm)

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**Shop now:** [https://www.desertcart.gr/products/6635153-50504-mt-85-manual-transmission-75w85-gl-4-gear-oil](https://www.desertcart.gr/products/6635153-50504-mt-85-manual-transmission-75w85-gl-4-gear-oil)

---

*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-01-31*