{"product_id":"royal-purple-max-gear-75w-90-synthetic-gear-oil-1-quart-gl-5-gl-4-high-performance-protection","title":"Royal Purple Max-Gear 75W-90 Synthetic Gear Oil 1 Quart — GL-5\/GL-4, High-Performance Protection","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple Max-Gear 75W-90 is a full-synthetic, high-performance gear oil formulated to protect heavily loaded differentials and manual transmissions while improving smoothness and reducing noise.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eMax-Gear blends premium synthetic base stocks with Royal Purple’s Synerlec additive technology to deliver durable lubrication for hypoid gears, manual transmissions and lower marine gear units that call for API GL-5 or GL-4 service. This 1-quart (32-ounce) bottle offers a convenient size for topping up differentials, performing maintenance on trucks, motorhomes, or cars, and for DIYers or professional shops that need a reliable, high-quality gear lubricant.\u003c\/p\u003e\n\n\u003ch3\u003eHow does Max-Gear 75W-90 protect heavily loaded gears?\u003c\/h3\u003e\n\u003cp\u003eMax-Gear is engineered to form a resilient lubricating film that resists shearing and protects gear teeth under high pressure. The Synerlec additive package reduces metal-to-metal contact, helping gears run cooler and extending component life without requiring additional aftermarket additives.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFormulated with high-quality synthetic base oils for thermal stability\u003c\/li\u003e\n  \u003cli\u003eSynerlec additive technology enhances wear protection\u003c\/li\u003e\n  \u003cli\u003eHypoid friction modifiers included for clutch and cone-type differentials\u003c\/li\u003e\n  \u003cli\u003eRated for API GL-5\/GL-4 applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this oil work in my differential or manual transmission?\u003c\/h3\u003e\n\u003cp\u003eUse Max-Gear wherever the vehicle manufacturer specifies an API GL-5 or GL-4 gear oil and permits 75W-90 viscosity. It’s suitable for front and rear differentials, manual transmissions, and lower marine gears that accept GL-5\/GL-4 fluids, so always check your owner’s manual for compatibility first.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRecommended for truck, RV\/motorhome, passenger car differentials\u003c\/li\u003e\n  \u003cli\u003eApproved for manual transmissions requiring hypoid friction modifiers\u003c\/li\u003e\n  \u003cli\u003eCompatible with many lower marine gear units specifying GL-5\/GL-4\u003c\/li\u003e\n  \u003cli\u003eNo extra friction modifiers or aftermarket additives needed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat performance benefits will I notice after switching to Max-Gear?\u003c\/h3\u003e\n\u003cp\u003eOwners commonly report smoother gear changes, quieter operation, and lower running temperatures after switching to a high-quality synthetic gear oil like Max-Gear. Because it resists breakdown under stress, it can help maintain gear efficiency and reduce the frequency of service interventions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eQuieter differential and transmission operation\u003c\/li\u003e\n  \u003cli\u003eImproved thermal and oxidative stability under load\u003c\/li\u003e\n  \u003cli\u003eReduced wear and prolonged component life\u003c\/li\u003e\n  \u003cli\u003eMaintains performance without additional additives\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I use and store this 1-quart bottle?\u003c\/h3\u003e\n\u003cp\u003eThe 32-ounce package is ideal for top-ups or smaller gearboxes; always follow your vehicle manufacturer’s recommended service intervals and fill procedures. Store the bottle upright in a cool, dry place away from direct sunlight and extreme temperatures to preserve additive effectiveness.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUse for topping off or small service jobs\u003c\/li\u003e\n  \u003cli\u003eFollow vehicle owner’s manual for fill levels and procedures\u003c\/li\u003e\n  \u003cli\u003eKeep tightly sealed and stored in a cool, dry environment\u003c\/li\u003e\n  \u003cli\u003eDispose of used oil and containers per local regulations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Royal Purple Max-Gear 75W-90 is aimed at vehicle owners and mechanics who need a robust synthetic gear oil for heavily loaded gear sets—owners of trucks, motorhomes, performance cars, and boats with lower gear units will benefit most. It’s also suitable for DIY enthusiasts and repair shops seeking a single product that covers many GL-5\/GL-4 applications without extra additives. For best results, confirm viscosity and API requirements in your equipment manual before use.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use Max-Gear 75W-90 in my car's differential?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes if your owner’s manual specifies API GL-5 or GL-4 and 75W-90 viscosity; verify compatibility before use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need to add extra additives with Max-Gear?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. Max-Gear includes Synerlec and hypoid friction modifiers, so additional additives are unnecessary.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":48087363551390,"sku":"B0007QGT34","price":36.66,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/royal-purple-max-gear-75w-90-front-label.jpg?v=1785921758","url":"https:\/\/northtrailauto.ca\/products\/royal-purple-max-gear-75w-90-synthetic-gear-oil-1-quart-gl-5-gl-4-high-performance-protection","provider":"North Trail Auto","version":"1.0","type":"link"}