---
product_id: 24084581
title: "50505 MT-85 Manual Transmission 75W85 GL-4 Gear Oil - 1 Gallon"
brand: "red line"
price: "฿13712"
currency: THB
in_stock: true
url: https://www.desertcart.co.th/products/24084581-50505-mt-85-manual-transmission-75w85-gl-4-gear-oil
store_origin: TH
region: Thailand
---

# 75W85 viscosity for optimal gear protection Smooth shifting even in cold climates Safe for brass synchros, no corrosive sulfurs 50505 MT-85 Manual Transmission 75W85 GL-4 Gear Oil - 1 Gallon

**Brand:** red line
**Price:** ฿13712
**Availability:** ✅ In Stock

## Summary

> ⚙️ Shift smarter, not harder — gear oil that keeps you ahead of the pack!

## Quick Answers

- **What is this?** 50505 MT-85 Manual Transmission 75W85 GL-4 Gear Oil - 1 Gallon by red line
- **How much does it cost?** ฿13712 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/24084581-50505-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

- • **Trusted Legacy:** Red Line’s proven performance since 1979 means no compromises on quality or reliability
- • **Synchro-Safe Formula:** Free from reactive sulfurs, perfect for brass synchros and sensitive transmissions
- • **Effortless Cold Shifts:** Balanced friction control ensures quicker, smoother gear changes in any weather
- • **Versatile Compatibility:** Ideal for Nissan 350Z/370Z, Mitsubishi Evo, Hyundai, Kia, and Quaife manual gearboxes
- • **Precision Gear Protection:** Extends synchro life with high-performance GL-4 formula

## Overview

Red Line 50505 MT-85 is a premium 75W85 GL-4 gear oil designed for superior gear and synchro protection. It enables quicker, smoother shifts even in cold climates and is safe for brass synchros, making it ideal for a wide range of manual transmissions including Nissan, Mitsubishi, Hyundai, and Kia models. Trusted since 1979, Red Line delivers uncompromising performance and longevity.

## Description

Red Line 50505 MT-85 Manual Transmission 75W85 GL-4 Gear Oil - 1 Gallon

## 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

## Product Details

- **Brand:** Red Line
- **Package Information:** Can
- **Liquid Volume:** 128 Fluid Ounces
- **Item Weight:** 7 Pounds
- **Recommended Uses For Product:** Automotive

## Images

![50505 MT-85 Manual Transmission 75W85 GL-4 Gear Oil - 1 Gallon - Image 1](https://m.media-amazon.com/images/I/71ah1WZ0rnL.jpg)

## Available Options

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

## Questions & Answers

**Q: Help. I have 09 Tacoma 5 speed manual will this item work or any other recommendation?**
A: If owners manual calls for a GL-4 oil then yes this is will be fine. Dont use GL-5 in a transmission that calls for GL-4. Sulpher in the oil will destroy the brass synchros and brass washers and parts. Redline is great but its not a miracle oil.

**Q: work on 370z ?**
A: MT-85 is specifically designed for the 370z. Take a look here: http://www.the370z.com/diy-section-do-yourself/8311-diy-transmission-oil-change.html

**Q: Will this be compatible with my 2014 F34 335i rear non-limited slip differential?**
A: This is not the correct fluid. You need 75w90 and this is 75w85. it's close but not the same. I would recommend the BMW Specific fluid for your car that is the correct spec.

**Q: Can it use with Vespa Paige 50cc?**
A: I purchased this oil for an older Hyundai with a manual transmission. I believe it is a formula specifically for Korean cars, and it worked remarkably well. With that said, I don't see where Vespa calls for this viscosity. Personally, I would stick with what they recommend.

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**Shop now:** [https://www.desertcart.co.th/products/24084581-50505-mt-85-manual-transmission-75w85-gl-4-gear-oil](https://www.desertcart.co.th/products/24084581-50505-mt-85-manual-transmission-75w85-gl-4-gear-oil)

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-02-17*