{"product_id":"royal-purple-max-gear-75w-140-gear-oil-1-quart-pack-of-6-full-synthetic-limited-slip-protection","title":"Royal Purple MAX GEAR 75W-140 Gear Oil 1-Quart Pack of 6 — Full-Synthetic, Limited-Slip Protection","description":"\u003cp\u003e\u003cstrong\u003eRoyal Purple MAX GEAR 75W-140 is a full-synthetic, limited-slip-capable gear oil in 1‑quart bottles, sold as a pack of six for heavy-duty and performance differentials.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eBuilt for modern passenger cars, trucks, and performance vehicles that demand high-load protection, this 75W-140 formulation combines synthetic base stocks with friction modifiers to support limited-slip differentials and hypoid gears. The thicker 75W-140 viscosity at operating temperature gives improved film strength under heavy load and high-temperature conditions compared with lighter gear oils, while the synthetic base helps resist shearing and oxidation over time.\u003c\/p\u003e\n\n\u003ch3\u003eHow does MAX GEAR 75W-140 protect my differential under load?\u003c\/h3\u003e\n\n\u003cp\u003eMAX GEAR 75W-140 is engineered to maintain a robust lubricating film between gear teeth under heavy torque and shock loads. That film reduces metal-to-metal contact, minimizing wear and extending gear life in towing, hauling, and spirited driving situations.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e75W-140 viscosity provides high-temperature film strength\u003c\/li\u003e\n  \u003cli\u003eSynthetic base oils reduce viscosity loss from shear\u003c\/li\u003e\n  \u003cli\u003eAdditive package enhances extreme-pressure protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this oil suitable for limited-slip differentials and what does the additive do?\u003c\/h3\u003e\n\n\u003cp\u003eThis product includes a friction modifier compatible with many limited-slip units to reduce chatter and improve engagement. The additive helps the clutch surfaces inside limited-slip differentials operate smoothly while still transmitting torque as designed.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eFormulated with limited-slip additive for clutch-type diffs\u003c\/li\u003e\n  \u003cli\u003eBalances traction and reduced noise\/harsh engagement\u003c\/li\u003e\n  \u003cli\u003eCompatible with many OEM limited-slip requirements — always confirm with your manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow often should I change the gear oil and can I mix it with other oils?\u003c\/h3\u003e\n\n\u003cp\u003eChange intervals depend on vehicle use, OEM recommendations, and operating conditions; severe duty (towing, racing, off-road) usually requires more frequent changes. While synthetic gear oils are often compatible with conventional oils, mixing reduces performance benefits — for best results, use Royal Purple MAX GEAR 75W-140 exclusively when possible and follow your owner’s manual.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eFollow the vehicle manufacturer’s maintenance schedule\u003c\/li\u003e\n  \u003cli\u003eSevere service may require shortened drain intervals\u003c\/li\u003e\n  \u003cli\u003eAvoid mixing brands\/types to preserve additive effectiveness\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this gear oil work in my car, truck, or performance build?\u003c\/h3\u003e\n\n\u003cp\u003eMAX GEAR 75W-140 is intended for hypoid gears and differentials that call for a 75W-140 viscosity and require limited-slip compatibility. Always verify your vehicle’s specifications before use, including API or OEM approvals listed in the manual.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eDesigned for hypoid and conventional differentials needing 75W-140\u003c\/li\u003e\n  \u003cli\u003eWorks for many light trucks, SUVs, and performance rear-ends\u003c\/li\u003e\n  \u003cli\u003eCheck manufacturer specs for compatibility and approvals\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Royal Purple MAX GEAR 75W-140 (1 qt, pack of 6) is aimed at owners and technicians who run heavy-duty or performance-driven differentials—towing enthusiasts, off-roaders, track-day drivers, and fleets—who want a stable synthetic gear oil with limited-slip capability and consistent high-temperature protection. It’s ideal when you need multiple quarts on hand for service or multiple vehicles, and when following the vehicle manufacturer’s recommendations for viscosity and additive needs is a priority.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eFeatures: For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.\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: Can I use MAX GEAR 75W-140 in a limited-slip differential?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — it contains a limited-slip friction modifier designed for clutch-type limited-slip differentials; verify compatibility with your vehicle manual.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is it safe to mix this synthetic with conventional gear oil?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Mixing is possible but not recommended; mixing can dilute additive effectiveness and reduce the synthetic benefits.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Royal Purple","offers":[{"title":"Default Title","offer_id":48085965045918,"sku":"B000J15THO","price":42.47,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/royal-purple-front-bottle-max-gear-75w140.jpg?v=1785881608","url":"https:\/\/northtrailauto.ca\/products\/royal-purple-max-gear-75w-140-gear-oil-1-quart-pack-of-6-full-synthetic-limited-slip-protection","provider":"North Trail Auto","version":"1.0","type":"link"}