{"product_id":"75w90-gl-5-gear-oil","title":"75W90 GL-5 Gear Oil","description":"The Red Line 75W90 GL-5 and MTL 75W80 GL-4 are full-synthetic, ester-based gear lubricants engineered for distinct automotive drivetrain needs. The 75W90 GL-5 formula contains extreme-pressure additives and friction modifiers designed specifically for hypoid gears and limited-slip differentials to reduce sliding friction and lower operating temperatures. In contrast, the MTL 75W80 GL-4 is optimized for manual transmissions and transaxles, featuring a coefficient of friction specifically balanced to ensure proper synchronizer engagement and prevent notchy shifting, especially in cold climates.\n\nCompatibility and application are critical due to the chemical differences between these formulations. The 75W90 GL-5 is not for use in most manual transmissions with synchronizers, as its high slipperiness may cause gear clash. Conversely, the MTL 75W80 GL-4, as well as MT-LV, MT-85, and MT-90, are not for use in differentials with hypoid gears. Users should strictly adhere to these exclusions to ensure proper component life and performance, as using the wrong oil can cause mechanical damage or poor shift quality. Both formulas offer superior shear stability, reduced oxidation, and consistent film thickness across a wide range of temperatures compared to conventional alternatives.","brand":"Red Line","offers":[{"title":"Default Title","offer_id":52689358356792,"sku":"50204 \/ 57904","price":25.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687612019.jpg?v=1784905660","url":"https:\/\/store.motormia.co\/products\/75w90-gl-5-gear-oil","provider":"MOTORMIA","version":"1.0","type":"link"}