--- product_id: 48189253 title: "Red Line (50304) MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart." brand: "red line" price: "€ 60.40" currency: EUR in_stock: true category: "Red Line" url: https://www.desertcart.pt/products/48189253-red-line-50304-mt-90-75w-90-gl-4-manual store_origin: PT region: Portugal --- # Perfect friction coefficient for quicker shifts 75W-90 viscosity for optimal gear protection GL-4 safe, non-corrosive to brass synchros Red Line (50304) MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart. **Brand:** red line **Price:** € 60.40 **Availability:** ✅ In Stock ## Summary > ⚙️ Shift smoother, drive smarter — the gear oil that means business. ## Quick Answers - **What is this?** Red Line (50304) MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart. by red line - **How much does it cost?** € 60.40 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/48189253-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 - • **Engineered Since 1979:** Red Line’s legacy ensures uncompromising quality and performance you can rely on. - • **Versatile Compatibility:** Meets GL-1, GL-3, and GL-4 specs, safe for brass synchros—no reactive sulfurs. - • **Pro-Level Gear Protection:** High-performance formula extends synchro life and guards gears under pressure. - • **Smooth Shifts, Every Time:** Eliminates notchy shifting even in cold starts for seamless gear changes. - • **Trusted Classic Car Essential:** Favored by vintage car enthusiasts for refining older manual transmissions. ## Overview Red Line MT-90 75W-90 GL-4 Manual Transmission Lubricant is a premium gear oil designed for manual transmissions and transaxles. It delivers superior gear and synchronizer protection with a perfect friction balance for smoother, quicker shifts—even in cold conditions. Compatible with GL-1, GL-3, and GL-4 applications, it’s safe for brass synchros and trusted by classic car owners to enhance gearbox performance and longevity. ## Description Red Line MT-90 Manual Transmission Lubricant A 75W90 GL-4 gear oil (SAE 10W/15W/40 engine oil viscosity) designed for use in manual transmissions and transaxles. Red Line MT-90 Manual Transmission Lubricant provides excellent protection of gears and synchronizers and its balanced slipperiness provides a perfect coefficient of friction, allowing easier shifting. Red Line MTL / MT-90 BENEFIT SUMMARY * Eliminates notchy shifting * Designed for manual transmissions and transaxles * Perfect synchronizer coefficient of friction * Enables high-speed downshifting * Excellent shifting even when cold * Eliminates gear whine and rattle at high temperatures * High-performance gear protection * Non-corrosive toward synchronizers * Satisfies manual transmissions and transaxles requiring motor oils or GL-1, GL-3, or GL-4 gear oils. ## 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 | B000CPCBEQ | | Best Sellers Rank | 61,386 in Automotive ( See Top 100 in Automotive ) 133 in Gear Oils | | Brand Name | Red Line | | Container Type | Bottle | | Customer Reviews | 4.8 4.8 out of 5 stars (2,712) | | Global Trade Identification Number | 00083522503044 | | Included Components | MT-90 75W-90 GL-4 | | Item Form | Oil | | Item Weight | 771 g | | Liquid Volume | 32 Fluid Ounces | | Manufacturer | Yukon Gear & Axle | | Material | Brass | | Model Number | 50304 | | Number of Items | 1 | | Number of Packs | 1 | | Part Number | 50304 | | Recommended Uses For Product | Automobile transmission lubrication and maintenance | | SAE J300 Viscosity Grade | 75W-90 | | Specific Uses For Product | Lubricant for manual transmissions and transaxles, Prevent corrosion, Enable smooth shifting, Provide gear protection | | UPC | 083522503044 | | Unit Count | 946.0 millilitre | | Viscosity | 75W-90 | ## Product Details - **Brand:** Red Line - **Item weight:** 771 g - **Liquid volume:** 32 Fluid Ounces - **Material:** Brass - **Package information:** Bottle ## Images ![Red Line (50304) MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart. - Image 1](https://m.media-amazon.com/images/I/61iZ6pnD7aL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Hello can you tell me if that oil is correct for my car toyota corolla 1.4vvt 56plate** A: Hi, I am not sure . Some need the semi synthetic others fully synthetic. If your manual says semi or fully synthetic go with that. There are semi and fully synthetic versions of the RedLine gear oil. **Q: Hi, is this suitable for a F31 330d bmw 2016? Rear differential** A: No. Definitely not suitable. Redline MT90 contains friction modifiers to help syncromesh operation in Manual Gearboxes and particularly suitable for older cars with worn syncro cones (and is fantastic oil in that context). I suggest you refer to your manual of dealer, Opie Oils recommend Febi Bilstein 75w-85 GL5 oil BUT there are variants with X drive that may require LSD oil depending on type of diff in car. **Q: Is this good for BMW 320d e92?** A: The oil in the BMW Coupe 320d (2006 to 2010) gearbox is a 75W80 GL-4 oil. So you would be after something like the Red Line MTL which meets the BMW spec. https://www.amazon.co.uk/Redline-manual-trans-quart-GL-4/dp/B000CPCBEG ## Frequently Bought Together - Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL)- 1 Quart - Red Line 57904 75W90 GL-5 Synthetic Gear Oil for Hypoid Limited Slip Differentials - 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) --- ## 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/48189253-red-line-50304-mt-90-75w-90-gl-4-manual](https://www.desertcart.pt/products/48189253-red-line-50304-mt-90-75w-90-gl-4-manual) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-10-14*