--- product_id: 7601143 title: "Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL)- 1 Quart (12 Pack)" brand: "red line" price: "€ 171.46" currency: EUR in_stock: false url: https://www.desertcart.pt/products/7601143-red-line-50304-mt-90-75w-90-gl-4-manual store_origin: PT region: Portugal --- # Reduces notchy shifting, even when cold 75W-90 viscosity for optimal gear protection Safe for brass synchros, extends synchro life Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL)- 1 Quart (12 Pack) **Brand:** red line **Price:** € 171.46 **Availability:** ❌ Out of Stock ## Summary > ⚙️ Shift Smooth, Drive Confident: The Ultimate Gear Oil Upgrade ## Quick Answers - **What is this?** Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL)- 1 Quart (12 Pack) by red line - **How much does it cost?** € 171.46 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/7601143-red-line-50304-mt-90-75w-90-gl-4-manual) ## 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:** Backed by Red Line’s 40+ years of high-performance lubrication expertise. - • **Cold-Start Performance:** Maintains perfect synchronizer friction coefficient even in low temperatures. - • **Versatile Compatibility:** Ideal for GL-1, GL-3, and GL-4 applications, trusted across multiple vehicle models. - • **Precision Gear Protection:** Formulated to extend synchro and gear life under demanding conditions. - • **Seamless Shifting Experience:** Eliminates notchy shifts for smooth, confident gear changes every time. ## Overview Red Line 50304 MT-90 is a premium 75W-90 GL-4 manual transmission and transaxle lubricant designed to protect gears and extend synchro life. It ensures quicker, smoother shifts by eliminating notchy engagement, even in cold conditions. Compatible with GL-1, GL-3, and GL-4 applications, it’s safe for brass synchros and free from damaging reactive sulfurs found in GL-5 oils. Trusted by professionals and enthusiasts alike, this lubricant delivers unmatched performance and reliability. ## Description Buy Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL)- 1 Quart (12 Pack): Gear Oils - desertcart.com ✓ FREE DELIVERY possible on eligible purchases ## Features - HIGH PERFORMANCE - gear protection and longer synchro life. Recommended for GL-1, GL-3, and GL-4 applications - QUICKER SHIFTS - perfect synchronizer coefficient of friction and eliminates notchy shifting, even when cold - REQUIREMENTS - gear oil viscosity of 75W; 80W; SAE 40 10W40 and 15W40 motor oil - POPULAR GEAR OIL FOR - GL-1, GL-3 and GL-4 applications, as well as where most special synchromesh fluids are specified. Safe for brass synchros, as it lacks the reactive sulfurs found in most GL-5 oils that cause damage - WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B005JVFC5S | | Best Sellers Rank | #1,708 in Automotive ( See Top 100 in Automotive ) #4 in Gear Oils | | Brand Name | Red Line | | Compatible Material | Brass | | Container Type | Bottle | | Customer Reviews | 4.9 4.9 out of 5 stars (5,095) | | Global Trade Identification Number | 00083522503242 | | Item Form | Oil | | Liquid Volume | 384 fluid ounces | | Manufacturer | Red Line | | Model Number | 50324 | | Number of Items | 12 | | Number of Packs | 12 | | Part Number | 50324 | | Recommended Uses For Product | Lube | | SAE J300 Viscosity Grade | 75W-90 | | UPC | 083522503242 | | Unit Count | 384 Fluid Ounces | | Viscosity | 75W-90 | ## Product Details - **Brand:** Red Line - **Liquid Volume:** 384 fluid ounces - **Package Information:** Bottle - **Recommended Uses For Product:** Lube - **Viscosity:** 75W-90 ## Images ![Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL)- 1 Quart (12 Pack) - Image 1](https://m.media-amazon.com/images/I/41ijNKuqKpL.jpg) ![Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL)- 1 Quart (12 Pack) - Image 2](https://m.media-amazon.com/images/I/41WsS-6gF6L.jpg) ![Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL)- 1 Quart (12 Pack) - Image 3](https://m.media-amazon.com/images/I/51nRu25pTqL.jpg) ![Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL)- 1 Quart (12 Pack) - Image 4](https://m.media-amazon.com/images/I/51L0fq6OW2L.jpg) ![Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL)- 1 Quart (12 Pack) - Image 5](https://m.media-amazon.com/images/I/51VObThNx9L.jpg) ## Available Options This product comes in different **Size, Number Of Items** options. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/7601143-red-line-50304-mt-90-75w-90-gl-4-manual](https://www.desertcart.pt/products/7601143-red-line-50304-mt-90-75w-90-gl-4-manual) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-10-01*