{"product_id":"shell-rotella-t6-full-synthetic-5w40-heavy-duty-diesel-engine-oil-18-9l-550046217","title":"Shell Rotella T6 Full Synthetic 5W40 Heavy-Duty Diesel Engine Oil, 18.9L – 550046217","description":"\u003ch2\u003eShell Rotella T6 Full Synthetic 5W40 Heavy-Duty Diesel Engine Oil – 18.9L | Part #550046217\u003c\/h2\u003e\u003cp\u003eRotella T6 is Shell’s full synthetic heavy-duty diesel engine oil, representing the top tier of the Rotella line. The 5W40 multi-grade formulation provides excellent cold-start protection down to low temperatures while maintaining a strong oil film at high operating temperatures — making it a year-round choice for demanding diesel applications. The 18.9L (5 US gallon) jug is the right size for shops and operators who want the performance of full synthetic without stepping up to a drum.\u003c\/p\u003e\u003ch3\u003eEnergized Protection® Formula\u003c\/h3\u003e\u003cp\u003eRotella T6 uses Shell’s proprietary Energized Protection® technology, which goes beyond conventional wear protection to actively control the three primary causes of diesel engine degradation:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAcid control\u003c\/strong\u003e — neutralizes combustion acids before they can attack engine surfaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeposit control\u003c\/strong\u003e — keeps pistons, rings, and combustion chambers clean for sustained efficiency\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWear protection\u003c\/strong\u003e — advanced synthetic base stock and additive package reduces metal-to-metal contact under high load\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull synthetic formulation\u003c\/strong\u003e — superior thermal stability, oxidation resistance, and low-temperature performance compared to conventional or synthetic-blend oils\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSAE 5W40 multi-grade\u003c\/strong\u003e — excellent cold-start flow and high-temperature viscosity retention for year-round use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBetter fuel economy\u003c\/strong\u003e — reduced internal friction contributes to measurable fuel savings in heavy-duty applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible with modern emissions systems\u003c\/strong\u003e — suitable for engines with EGR, DPF, and SCR systems where the oil specification permits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackward compatible\u003c\/strong\u003e — suitable for older diesel engines as well as modern low-emission powerplants\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e18.9L jug\u003c\/strong\u003e — 5 US gallons, practical for multi-quart fills or keeping a full season’s supply on hand\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGrade: SAE 5W40 (full synthetic)\u003c\/li\u003e\n\u003cli\u003eApplication: Heavy-duty diesel engines (on-highway, off-highway, marine auxiliary, stationary)\u003c\/li\u003e\n\u003cli\u003eSize: 18.9L (5 US gallons)\u003c\/li\u003e\n\u003cli\u003ePart number: 550046217\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eBest use case:\u003c\/strong\u003e Rotella T6 5W40 is the right choice when maximum protection is the priority — high-hour engines, turbocharged diesel powerplants, cold-climate operation, or any application where extended drain intervals are desired and the OEM approves a full synthetic 5W40. The 18.9L jug is particularly practical for operators servicing larger diesel engines (8+ quart capacity) or for shops that want to keep a full synthetic option stocked without committing to a drum. For the same T6 formulation in a smaller 5L bottle, see the \u003ca href=\"\/products\/11120080584740\"\u003eShell Rotella T6 Full Synthetic 5W40, 5L – 550046214\u003c\/a\u003e. If your application calls for a conventional or synthetic-blend 15W40 instead of a full synthetic 5W40, the Rotella T4 Triple Protection is available in \u003ca href=\"\/products\/11120080519204\"\u003e5L (3\/case)\u003c\/a\u003e, \u003ca href=\"\/products\/11120080453668\"\u003e9.5L (2\/case)\u003c\/a\u003e, \u003ca href=\"\/products\/11120080486436\"\u003e18.9L (2\/case)\u003c\/a\u003e, and \u003ca href=\"\/products\/11120080551972\"\u003e208L drum\u003c\/a\u003e formats.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Always confirm your engine manufacturer’s oil specification — viscosity grade, API service category, and any OEM approvals — before ordering. Not all diesel engines approve a 5W40 full synthetic; verify your engine’s requirement in the service manual.\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51199661408292,"sku":"852-550046217","price":233.99,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/852-550046217.jpg?v=1785611270","url":"https:\/\/marisolmarine.com\/products\/shell-rotella-t6-full-synthetic-5w40-heavy-duty-diesel-engine-oil-18-9l-550046217","provider":"Marisol Marine Company","version":"1.0","type":"link"}