{"product_id":"sierra-18-9420-10w-30-4-stroke-marine-outboard-engine-oil-available-in-quart-and-gallon","title":"Sierra 10W30 4-Stroke Marine Outboard Engine Oil - Available in Quart and Gallon","description":"\u003cp\u003eSierra 10W30 4-Stroke Marine Outboard Engine Oil is a premium blend lubricant formulated specifically for the demands of 4-stroke outboard motors. The 10W-30 viscosity offers better cold-starting performance while reducing sludge buildup, helping keep the engine cleaner and running more efficiently over time. It is formulated to meet or exceed the requirements set by 4-stroke marine motor manufacturers and is certified to API SJ, CF-2, and CH-4 performance standards, as well as NMMA FC-W certified for marine service.\u003c\/p\u003e\u003cp\u003eThis oil is packaged in a bottle and is sold as a single unit in your choice of size, making it easy to keep the right amount of oil on hand whether you are doing a routine top-off or a full oil change. As a 4-stroke formulation, it is intended for outboard engines that require 4-stroke oil rather than 2-stroke oil\/fuel mix.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-9420\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e 4-Stroke Marine Outboard Engine Oil\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eViscosity Grade:\u003c\/strong\u003e 10W-30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e API SJ, CF-2, CH-4; NMMA FC-W Certified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContainer Type:\u003c\/strong\u003e Bottle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1 per bottle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSizes Available:\u003c\/strong\u003e Quart, Gallon\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSizes \u0026amp; Options\u003c\/h3\u003e\u003cp\u003eThis oil is offered in two bottle sizes to match how you use it. Choose the Quart size for topping off oil levels or smaller jobs, or choose the Gallon size for a full oil change or if you run through oil more quickly. Select the size you need from the options above; both sizes contain the same 10W30 4-Stroke formulation.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat size options are available for this oil?\u003c\/strong\u003e Sierra 10W30 4-Stroke Marine Outboard Engine Oil (part 18-9420) is sold in a Quart bottle or a Gallon bottle, so you can pick the amount that matches your oil change or top-off needs.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this oil for 2-stroke or 4-stroke outboard engines?\u003c\/strong\u003e This is a 4-Stroke formulation, meant for 4-stroke outboard motors rather than 2-stroke engines that require an oil\/fuel mix.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat viscosity grade is this oil?\u003c\/strong\u003e It is a 10W-30 viscosity blend, chosen for its low-temperature viscosity that supports easier cold starting in outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat certifications does this oil carry?\u003c\/strong\u003e The 10W30 formulation meets API SJ, CF-2, and CH-4 performance standards and is NMMA FC-W Certified for marine use.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I choose between the Quart and Gallon size?\u003c\/strong\u003e Pick the Quart of Sierra 18-9420 10W30 4-Stroke oil for smaller top-offs, or the Gallon size if you are doing a complete oil change or need a larger supply on hand.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this oil help reduce engine sludge?\u003c\/strong\u003e Yes, the 10W-30 blend is formulated to reduce sludge buildup, which helps keep the outboard engine cleaner and running more efficiently.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat container does the oil come in?\u003c\/strong\u003e Both the Quart and Gallon sizes of Sierra 18-9420 10W30 4-Stroke oil are packaged in bottles.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra product?\u003c\/strong\u003e Yes, this is genuine Sierra-branded 10W30 4-Stroke Marine Outboard Engine Oil, part number 18-9420.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many bottles come in an order?\u003c\/strong\u003e Each order is for a single bottle, available as either a Quart or a Gallon of Sierra 18-9420 10W30 4-Stroke oil.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this oil work for cold-weather starting?\u003c\/strong\u003e The 10W-30 grade's low-temperature viscosity is designed to offer better cold starting compared to heavier grades.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Quart","offer_id":48988059336923,"sku":"SIE-18-9420-2","price":11.14,"currency_code":"USD","in_stock":true},{"title":"Gallon","offer_id":48988059369691,"sku":"SIE-18-9420-3","price":41.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-9420-2_NEW__03649.1771624653.500.750.jpg?v=1785188963","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-9420-10w-30-4-stroke-marine-outboard-engine-oil-available-in-quart-and-gallon","provider":"Good Vibes Marina","version":"1.0","type":"link"}