{"product_id":"castrol-gtx-20w-50-engine-oil-4-lts","title":"Castrol GTX 20W-50 Engine Oil 4 Lts","description":"Castrol 20W50 GTX Engine Oil — 4 Lts\r\n\r\nCastrol GTX with Sludge Protection Technology — a proven mineral-based engine oil trusted for generations to help extend engine life. Engineered for everyday petrol and diesel cars seeking reliable, proven engine protection.\r\n\r\nViscosity \u0026amp; Temperature: The 20W50 multigrade rating means this oil suitable for warm climates; circulates at ambient temperatures above -10°C and delivers a thick SAE 50 film at 100°C for extra engine protection. The heavy SAE 50 high-temperature grade provides an extra-thick oil film, ideal for older engines with worn components or taxis and commercial vehicles running for long hours in hot weather. Perfectly suited to India's diverse climate — from cold Himalayan mornings to peak-summer plains temperatures exceeding 45°C.\r\n\r\nUnderstanding 20W50: The first number (20W) is the Winter cold-flow rating — lower means better oil flow at cold start, protecting your engine in the critical first seconds after ignition. The second number (50) is the high-temperature viscosity at 100°C — higher means a thicker, stronger protective film under heat and load.\r\n\r\nPack size: The 4 Lts pack covers a complete engine oil change for most older and high-mileage cars, diesel taxis, and vehicles operating in hot climates. Change oil at your manufacturer's recommended interval — typically every 5,000–10,000 km — to maximise engine life and fuel efficiency.","brand":"ajmeratyres","offers":[{"title":"Default Title","offer_id":45911301390570,"sku":null,"price":0.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0708\/3186\/6090\/files\/Castrol_GTX_20W50_4_Lts.png?v=1773898666","url":"https:\/\/www.ajmeratyres.com\/products\/castrol-gtx-20w-50-engine-oil-4-lts","provider":"ajmeratyres","version":"1.0","type":"link"}