--- product_id: 422174199 title: "MT-90 Gear Oil- 1 Quart, Pack of 4" brand: "red line" price: "291663CFA" currency: XOF in_stock: true reviews_count: 5 category: "Red Line" url: https://www.desertcart.sn/products/422174199-mt-90-gear-oil-1-quart-pack-of-4 store_origin: SN region: Senegal --- # High shear & oxidation stability under heat GL-4 rating ideal for manual transmission synchros 75W-90 viscosity for optimal gear protection MT-90 Gear Oil- 1 Quart, Pack of 4 **Brand:** red line **Price:** 291663CFA **Availability:** ✅ In Stock ## Summary > ⚙️ Shift smoother, drive smarter — never settle for less than Red Line MT-90! ## Quick Answers - **What is this?** MT-90 Gear Oil- 1 Quart, Pack of 4 by red line - **How much does it cost?** 291663CFA with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/422174199-mt-90-gear-oil-1-quart-pack-of-4) ## 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 - • **Long-Lasting Stability:** Exceptional shear and oxidation resistance means your transmission fluid stays effective longer. - • **Precision Shiftability:** Engineered to eliminate hard shifting and deliver silky smooth gear changes every time. - • **Trusted by Enthusiasts:** Highly rated by drivers who demand quiet, precise shifting in both domestic and import vehicles. - • **Synchro-Friendly Formula:** Perfect coefficient of friction protects delicate manual transmission synchronizers without wear. - • **Temperature-Resistant Performance:** Synthetic base oils maintain consistent viscosity from cold starts to high-heat operation. ## Overview Red Line MT-90 Gear Oil is a premium synthetic 75W-90 lubricant designed specifically for manual transmissions and transaxles. It offers superior shiftability by matching the ideal friction coefficient for synchronizers, preventing hard shifts and gear wear. With excellent shear and oxidation stability, it maintains consistent viscosity across temperature extremes, ensuring long-lasting protection and quieter operation. Rated GL-4, it’s the go-to choice for enthusiasts seeking reliable, high-performance gear oil that enhances transmission life and driving experience. ## Description Red Line Oil MT-90 is designed to provide excellent protection and improved shiftability for manual transmissions and transaxles having cured the problem of hard shifting in thousands of transmissions with shifting troubles They have the appropriate coefficient of friction for most manual transmission synchronizers many gear oils engine oils and ATFs are too slippery for proper synchro engagement The synthetic base oils used have a very high viscosity index which provides relatively constant viscosity as temperature changes MT-90 is a thicker 75W90 version of MTL The shear stability and oxidation stability of these products are excellent thus the physical characteristics of Red Line MT-90 will change little with use Review: Smooth Shifting and Quiet Operation—Worth the Upgrade - Red Line MT-90 is a top-tier synthetic gear oil that delivers noticeable improvements in manual transmission performance. I used it in a high-mileage 5-speed and immediately felt smoother shifts—especially in cold weather. It quieted down some minor gear whine and made engagement feel more precise. The GL-4 rating is perfect for transmissions that need protection without the aggressive additives found in GL-5 oils, which can be harsh on yellow metals like synchros. The viscosity is ideal for most import and domestic gearboxes that spec 75W-90, and it holds up well under heat and load. If you're chasing better shift feel or just want to treat your transmission right, MT-90 is a solid investment. It’s not the cheapest option, but the performance and protection are worth every drop. Review: Smooth shifting - Shifts very smooth in my 2009 mazdaspeed 3 ## Features - Item Category: Machine Lubricant - Item Trademark: Red Line Oil - manufacturer: Generic ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003P550IE | | Brand | Red Line | | Brand Name | Red Line | | Container Type | Bottle | | Customer Reviews | 4.8 out of 5 stars 405 Reviews | | Item Form | Oil | | Item form | Oil | | Liquid Volume | 128 Fluid Ounces | | Liquid volume | 128 Fluid Ounces | | Manufacturer | Red Line | | Material | Synthetic | | Model Number | 50304 | | Package information | Bottle | | Part Number | 50304 | | Recommended Uses For Product | Gear Oil | | Recommended uses for product | Gear Oil | | UPC | 737534816608 | | Unit Count | 128.0 Fluid Ounces | ## Product Details - **Brand:** Red Line - **Liquid volume:** 128 Fluid Ounces - **Material:** Synthetic - **Package information:** Bottle - **Recommended uses for product:** Gear Oil ## Images ![MT-90 Gear Oil- 1 Quart, Pack of 4 - Image 1](https://m.media-amazon.com/images/I/71LJIn7PldL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Smooth Shifting and Quiet Operation—Worth the Upgrade *by F***E on 14 October 2025* Red Line MT-90 is a top-tier synthetic gear oil that delivers noticeable improvements in manual transmission performance. I used it in a high-mileage 5-speed and immediately felt smoother shifts—especially in cold weather. It quieted down some minor gear whine and made engagement feel more precise. The GL-4 rating is perfect for transmissions that need protection without the aggressive additives found in GL-5 oils, which can be harsh on yellow metals like synchros. The viscosity is ideal for most import and domestic gearboxes that spec 75W-90, and it holds up well under heat and load. If you're chasing better shift feel or just want to treat your transmission right, MT-90 is a solid investment. It’s not the cheapest option, but the performance and protection are worth every drop. ### ⭐⭐⭐⭐⭐ Smooth shifting *by H***Y on 9 November 2025* Shifts very smooth in my 2009 mazdaspeed 3 ### ⭐⭐⭐⭐⭐ Quality fluid, worthy investment. *by U***N on 5 May 2026* Quality, helps shifting, protects transmission, reduces noise, easy to pour in and its lubricity and greasiness is perfect for older and newer vehicles. Lasts longer than stock fluids too ## Frequently Bought Together - Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 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) - Red Line 57904 75W90 GL-5 Synthetic Gear Oil for Hypoid Limited Slip Differentials - 1 Quart (4 Pack) --- ## 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.sn/products/422174199-mt-90-gear-oil-1-quart-pack-of-4](https://www.desertcart.sn/products/422174199-mt-90-gear-oil-1-quart-pack-of-4) --- *Product available on Desertcart Senegal* *Store origin: SN* *Last updated: 2026-06-18*