{"product_id":"lucas-oil-synthetic-sae-75w-90-gear-oil-1-gallon-high-temp-thermal-stability-ep-protection","title":"Lucas Oil Synthetic SAE 75W-90 Gear Oil 1 Gallon — High-Temp Thermal Stability \u0026 EP Protection","description":"\u003cp\u003e\u003cstrong\u003eLucas Oil 10048 Synthetic SAE 75W-90 Gear Oil is a heavy-duty, high-temperature synthetic gear lubricant formulated to cushion gears, resist squeeze-out under extreme pressure, and retain lubricity when conditions get hot.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eBuilt for demanding differentials, manual transmissions and gear sets, this Lucas Oil synthetic gear oil uses a specialized additive package to protect gear teeth from metal-to-metal contact and to remain effective at elevated temperatures. Its formulation focuses on extreme-pressure resilience and thermal stability, so it keeps working where lesser lubricants thin out or fail. The product comes in a convenient 1-gallon container for shop use or fleet servicing.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this gear oil protect gears under extreme pressure?\u003c\/h3\u003e\n\u003cp\u003eThe oil contains robust extreme-pressure (EP) additives that cushion gear surfaces and prevent direct metal contact when loads spike. That additive chemistry reduces wear during shock loads and helps prevent pitting and scoring on gear teeth.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSpecial additive package designed to resist \"squeezing out\" under pressure\u003c\/li\u003e\n  \u003cli\u003eFormulated to maintain a lubricating film during high-load events\u003c\/li\u003e\n  \u003cli\u003eReduces wear and extends gear life in demanding applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill it hold up at high operating temperatures?\u003c\/h3\u003e\n\u003cp\u003eThis synthetic SAE 75W-90 is engineered for thermal stability, so it resists thinning and preserves lubricity when gearboxes run hot. Consistent lubricating properties at high temps help maintain reliable shifting and torque transfer.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSynthetic base oils selected for high-temperature performance\u003c\/li\u003e\n  \u003cli\u003eAdditives that prevent viscosity breakdown under heat\u003c\/li\u003e\n  \u003cli\u003eSuitable for applications where temperature control is a challenge\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich vehicles and components are best suited for this oil?\u003c\/h3\u003e\n\u003cp\u003eLucas Oil 75W-90 synthetic gear oil is appropriate for many manual transmissions, differentials and transaxles that specify SAE 75W-90. It’s a practical choice for heavy-duty trucks, off-road vehicles, performance cars, and fleets that demand durable protection.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eManual gearboxes and limited-slip differentials (where specified)\u003c\/li\u003e\n  \u003cli\u003eCommercial and heavy-duty vehicle drivelines\u003c\/li\u003e\n  \u003cli\u003ePerformance and off-road applications needing robust EP protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I use and store the 1-gallon container?\u003c\/h3\u003e\n\u003cp\u003eUse standard service procedures for draining and refilling gearcases, following the vehicle manufacturer’s capacity and change interval recommendations. Store the sealed gallon upright in a cool, dry place away from direct sunlight to maintain additive effectiveness.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFollow OEM viscosity and specification guidance before use\u003c\/li\u003e\n  \u003cli\u003eKeep container sealed until ready to dispense to avoid contamination\u003c\/li\u003e\n  \u003cli\u003eDispose of used oil per local environmental regulations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Mechanics, fleet managers, off-road enthusiasts and performance drivers who need a durable synthetic gear lubricant will benefit from Lucas Oil 10048 SAE 75W-90. It’s made for anyone seeking heavy-duty, high-temperature gear protection in a ready-to-use 1-gallon supply—especially where extreme pressure resistance and thermal stability are priorities.\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHeavy duty\u003c\/li\u003e\n\u003cli\u003eHigh performance\u003c\/li\u003e\n\u003cli\u003eStands up to high temperatures\u003c\/li\u003e\n\u003c\/ul\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: Is Lucas Oil 75W-90 suitable for limited-slip differentials?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It’s suitable where the manufacturer allows SAE 75W-90; check your vehicle specs for limited-slip compatibility and additive requirements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I change this gear oil?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Follow the vehicle maker’s recommended interval; heavy-duty or severe use may require more frequent changes.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Lucas Oil","offers":[{"title":"Default Title","offer_id":67585825669305,"sku":"B000IG20RC","price":146.32,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/lucas-oil-10048-front-gallon.jpg?v=1790478294","url":"https:\/\/redleafauto.ca\/products\/lucas-oil-synthetic-sae-75w-90-gear-oil-1-gallon-high-temp-thermal-stability-ep-protection","provider":"Redleaf Auto","version":"1.0","type":"link"}