---
product_id: 2018135
title: "Red Line 50204 SAE 75W80 API GL-4 Manual Transmission and Transaxle Lubricant (MTL) Car Gear Oil - 1 Quart"
brand: "red line"
price: "HK$333"
currency: HKD
in_stock: true
reviews_count: 13
category: "Red Line"
url: https://www.desertcart.hk/products/2018135-red-line-50204-sae-75w80-api-gl-4-manual-transmission
store_origin: HK
region: Hong Kong
---

# Balanced friction for quicker, smoother shifts 75W80 SAE viscosity for optimal gear protection GL-4 safe formula protects brass synchros Red Line 50204 SAE 75W80 API GL-4 Manual Transmission and Transaxle Lubricant (MTL) Car Gear Oil - 1 Quart

**Brand:** red line
**Price:** HK$333
**Availability:** ✅ In Stock

## Summary

> ⚙️ Shift Smarter, Drive Confidently — The Gear Oil Your Manual Transmission Deserves

## Quick Answers

- **What is this?** Red Line 50204 SAE 75W80 API GL-4 Manual Transmission and Transaxle Lubricant (MTL) Car Gear Oil - 1 Quart by red line
- **How much does it cost?** HK$333 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/2018135-red-line-50204-sae-75w80-api-gl-4-manual-transmission)

## 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

- • **Proven Compatibility:** Recommended for premium brands like BMW, Honda/Acura, Mini Cooper, Land Rover, and more—trusted by enthusiasts and pros alike.
- • **Synchro-Safe Chemistry:** GL-4 rating ensures compatibility with brass synchros, avoiding damage common in GL-5 oils.
- • **DIY Friendly Maintenance:** Easy to use quart bottle with clear instructions—upgrade your manual transmission fluid and feel the difference within 100 miles.
- • **Precision Gear Protection:** Extends synchro life with high-performance synthetic formula trusted since 1979.
- • **Effortless Shifting Experience:** Balanced friction control delivers quicker, smoother gear changes—no more crunching or hesitation.

## Overview

Red Line 50204 SAE 75W80 API GL-4 Manual Transmission Lubricant is a premium synthetic gear oil designed for manual transmissions and transaxles. It offers superior gear protection, extends synchro life, and ensures quicker, smoother shifts with a friction-balanced formula safe for brass synchros. Compatible with a wide range of vehicles including BMW, Honda/Acura, and Land Rover, this 1-quart bottle is perfect for DIY maintenance or professional use, delivering noticeable performance improvements and long-lasting reliability.

## Description

Buy Red Line 50204 SAE 75W80 API GL-4 Manual Transmission and Transaxle Lubricant (MTL) Car Gear Oil - 1 Quart: Transmission Fluids - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Works well on BMW e60 - I have an '07 BMW 550i with a stick shift that I picked up this past summer. No idea when or if the transmission oil was last changed. The gearbox mostly shifted fine, but there were times it was reluctant to go into gear, and crunched a weee bit on occasion, so I figured a transmission oil change was a good first step. BMW, of course, only recommends their own $50+ per liter solution, but this redline MTL was recommended on a couple of sites / forums @ half the price. Oil change was stupidly easy, with the worse part being the removal and reinstall of the underbody tray. Note that the car does need to be level in order to refill the gearbox properly, so that may be easier for some than others. I am fortunate enough to have a lift, so it was <30min job. It took a full 2qts, so if you have an e60 V8 BMW manual, you may want to grab a 3rd qt just in case you have some spillage. There are plenty of online videos with instructions you can search for help. The old oil in the gearbox was definitely well used, but not so terrible that I would believe it to have been the original oil. BMW has this stupid concept of "lifetime fill" with transmission fluid for the past ~20 years. This obviously discourages proper maintenance, so it really wouldn't have been surprising to find original fluid in a 16 year old car with 110k miles. I did the differential fluid as well with the redline oil recommended for that application. I did not notice much of a change the first couple trips after the oil change, but after 50-100 miles, I could definitely tell the difference. Every shift has a more "syrupy" feel to it, and the shifts slot into place with a more positive action overall. This gearbox still doesn't like to be rushed. This MTL fluid won't turn your BMW into a Honda, but it definitely works well and costs a lot less than the "genuine" oil. Definitely a worthwhile job to perform yourself, if you are able, and a great product to improve the driving experience.
Review: Worked great - Noticeably smoother after replacing fluid.

## 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 - MLT Gear Oil with balanced friction control for most manual transmission synchronizers. Other synthetic gear oils are often too slippery.
- 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 MOTOR OIL FOR - BMW, Honda/Acura, Ford Focus, late-model Mini Cooper, Land Rover/Range Rover LT77S, Mitsubishi, Dodge & Jeep NV1500, NV3500, NV3550 & NV5600 truck transmissions.
- WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000CPCBEG |
| Best Sellers Rank | #10,134 in Automotive ( See Top 100 in Automotive ) #62 in Transmission Fluids |
| Brand | Red Line |
| Brand Name | Red Line |
| Container Type | Bottle |
| Customer Reviews | 4.8 out of 5 stars 1,741 Reviews |
| Flash Point | 232 Degrees Celsius |
| Global Trade Identification Number | 00083522502047 |
| Included Components | Auto part, Automotive Accessories, Replacement and Performance parts |
| Item Form | Liquid |
| Item Type Name | Car Gear Oil - 1 Quart Bottle |
| Item Weight | 1.7 Pounds |
| Liquid Volume | 32 Fluid Ounces |
| Manufacturer | Red Line |
| Material | Synthetic |
| Model Number | (50204) |
| Number of Items | 1 |
| Package Information | Bottle |
| Part Number | 50204 |
| Recommended Uses For Product | auto racing |
| Specific Uses For Product | Specific vehicle transmissions (e.g. BMW, Honda/Acura, Ford Focus, Land Rover/Range Rover LT77S, Mitsubishi, Dodge & Jeep NV1500, NV3500, NV3550 & NV5600 truck transmissions) |
| UPC | 083522502047 |
| Unit Count | 32.0 Fluid Ounces |
| Upper Temperature Rating | 1 Kelvin |
| Viscosity | 185 |
| Warranty Description | Manufacturer Warranty |

## Product Details

- **Brand:** Red Line
- **Item Weight:** 1.7 Pounds
- **Liquid Volume:** 32 Fluid Ounces
- **Material:** Synthetic
- **Package Information:** Bottle

## Images

![Red Line 50204 SAE 75W80 API GL-4 Manual Transmission and Transaxle Lubricant (MTL) Car Gear Oil - 1 Quart - Image 1](https://m.media-amazon.com/images/I/71fVon1mirL.jpg)

## Questions & Answers

**Q: Can I use this for my 2011 Mazdaspeed 3? (Manual transmission)**
A: It's in my 2014 CX-5 which requires 75W-80. Works better than Mazda MTF.

**Q: What kind of improvement will I see using this over factory in an mt82 in a mustang?**
A: Not much, it runs a tad smoother when at temp but the notorious 3rd gear issue is still present, I noticed 5th would also scratch when it got really really cold. I'm thinking about switching to ATF like most others have in accordance with Ford's specs.

**Q: I have a bmw 89 325IS and i need 80w gl-4 which one is the one i need to get?**
A: If you have a manual transmission then you are looking at the correct one which is part number 50204

**Q: Is this safe to use in my 1980 Mercedes Benz 240D?**
A: Did a search on Pelican Parts for your 240D and it recommends this fluid for your manual transmission.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works well on BMW e60
*by E***Y on November 6, 2023*

I have an '07 BMW 550i with a stick shift that I picked up this past summer. No idea when or if the transmission oil was last changed. The gearbox mostly shifted fine, but there were times it was reluctant to go into gear, and crunched a weee bit on occasion, so I figured a transmission oil change was a good first step. BMW, of course, only recommends their own $50+ per liter solution, but this redline MTL was recommended on a couple of sites / forums @ half the price. Oil change was stupidly easy, with the worse part being the removal and reinstall of the underbody tray. Note that the car does need to be level in order to refill the gearbox properly, so that may be easier for some than others. I am fortunate enough to have a lift, so it was <30min job. It took a full 2qts, so if you have an e60 V8 BMW manual, you may want to grab a 3rd qt just in case you have some spillage. There are plenty of online videos with instructions you can search for help. The old oil in the gearbox was definitely well used, but not so terrible that I would believe it to have been the original oil. BMW has this stupid concept of "lifetime fill" with transmission fluid for the past ~20 years. This obviously discourages proper maintenance, so it really wouldn't have been surprising to find original fluid in a 16 year old car with 110k miles. I did the differential fluid as well with the redline oil recommended for that application. I did not notice much of a change the first couple trips after the oil change, but after 50-100 miles, I could definitely tell the difference. Every shift has a more "syrupy" feel to it, and the shifts slot into place with a more positive action overall. This gearbox still doesn't like to be rushed. This MTL fluid won't turn your BMW into a Honda, but it definitely works well and costs a lot less than the "genuine" oil. Definitely a worthwhile job to perform yourself, if you are able, and a great product to improve the driving experience.

### ⭐⭐⭐⭐⭐ Worked great
*by A***R on May 9, 2026*

Noticeably smoother after replacing fluid.

### ⭐⭐⭐⭐⭐ Great fluid
*by D***N on October 19, 2025*

This came highly recommended as a replacement for the OE MTF in my FL5 Civic Type R. After driving around for a few weeks I can say the shift quality improved - especially shifting to/from 2nd. Cold-start shifting is also improved somewhat. Overall I am satisfied. The FL5 CTR takes a little over 2.3 qts.

## Frequently Bought Together

- Red Line 50204 SAE 75W80 API GL-4 Manual Transmission and Transaxle Lubricant (MTL) Car Gear Oil - 1 Quart
- Slippery Pete - Fluid Pump for Standard Quart Bottles - 8cc per Pump Stroke and 3rd Hand Adapter, Transfer Gear Oil, Transmission and Differential Fluid (28mm)
- Red Line 50204 SAE 75W80 API GL-4 Manual Transmission and Transaxle Lubricant (MTL) Car Gear Oil - 1 Quart (2 Pack)

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-07-06*