{"product_id":"stp-high-mileage-fuel-injector-carburetor-treatment-5-25-oz-upper-cylinder-lubricant-cap-less-compatible-12-pack","title":"STP High Mileage Fuel Injector \u0026 Carburetor Treatment 5.25 oz — Upper Cylinder Lubricant, Cap‑less Compatible (12 Pack)","description":"\u003cp\u003e\u003cstrong\u003eSTP High Mileage Fuel Injector and Carburetor Treatment is a concentrated bottle formula that cleans fuel injectors and carburetors while lubricating the upper cylinder to help restore smooth starting and steady acceleration.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf carbon, varnish and other fuel deposits are building up in your engine, performance and efficiency can suffer. This STP treatment uses a jet-fuel-based carrier to deliver cleaning agents and a lubricant designed for upper-cylinder protection. Each 5.25-ounce bottle treats up to about 21 gallons of gasoline, and the formula is compatible with vehicles that have cap-less fuel systems, making it versatile for many modern cars and light trucks.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this product improve throttle response and starting?\u003c\/h3\u003e\n\u003cp\u003eThe treatment dissolves and helps remove deposits that form on injectors, carburetor parts and intake components, which can cause hesitation and hard starts. By clearing these obstructions and adding a light upper-cylinder lubricant, combustion becomes more consistent and ignition is aided.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBreaks down carbon and varnish on injectors and carburetors\u003c\/li\u003e\n  \u003cli\u003eLubricates valve stems and rings to reduce friction\u003c\/li\u003e\n  \u003cli\u003eHelps restore smoother cold and hot starts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill it work with modern vehicles and cap-less fuel systems?\u003c\/h3\u003e\n\u003cp\u003eYes — the formula is designed to be cap-less fuel system compatible, so you can add it at the pump without special adapters. It is safe for use in any gasoline engine and formulated to mix with fuel to treat the fuel system while driving.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with cap-less fuel inlet designs\u003c\/li\u003e\n  \u003cli\u003eSafe for all gasoline engine types\u003c\/li\u003e\n  \u003cli\u003eNo special tools required; pour into the tank during refueling\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow much fuel does one bottle treat and how often should I use it?\u003c\/h3\u003e\n\u003cp\u003eEach 5.25-ounce bottle treats up to roughly 21 gallons of gasoline, so dosing is simple: one bottle per tank for larger tanks, or adjust proportionally for smaller fills. For regular maintenance, many drivers use a treatment every few fill-ups or follow interval guidance in their vehicle’s service recommendations.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOne bottle treats up to ~21 gallons\u003c\/li\u003e\n  \u003cli\u003eUse every few fill-ups for preventative care\u003c\/li\u003e\n  \u003cli\u003eUse as needed for performance restoration\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this safe for long-term engine components and fuel system parts?\u003c\/h3\u003e\n\u003cp\u003eThe product is formulated to be safe for fuel system materials and engine components when used as directed; it focuses on removing deposits without harsh effects on seals or sensors. The lubricant component is meant to reduce upper-cylinder wear, not to alter fuel chemistry in ways that harm catalysts or oxygen sensors.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFormulated to avoid damage to seals and fuel system parts\u003c\/li\u003e\n  \u003cli\u003eContains lubricant to reduce upper-cylinder friction\u003c\/li\u003e\n  \u003cli\u003eDesigned for routine maintenance and targeted cleaning needs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Drivers who want to maintain or restore gasoline engine performance — especially those with higher-mileage vehicles, cars showing mild hesitation or rough idling, or anyone wanting periodic preventative care. It’s also a practical choice for fleet managers and DIY enthusiasts looking for a straightforward, cap-less compatible treatment to keep injectors and carburetors cleaner between professional services.\u003c\/p\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: How much gasoline does one 5.25 oz bottle treat?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Each bottle treats up to about 21 gallons of gasoline; adjust proportionally for smaller tanks.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this safe for vehicles with cap-less fuel systems?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, the formula is compatible with cap-less fuel systems and can be added at the pump.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"STP","offers":[{"title":"Default Title","offer_id":48086193963166,"sku":"B0099QQR1M","price":47.39,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/stp-bottle-front-packaging.jpg?v=1785889368","url":"https:\/\/northtrailauto.ca\/products\/stp-high-mileage-fuel-injector-carburetor-treatment-5-25-oz-upper-cylinder-lubricant-cap-less-compatible-12-pack","provider":"North Trail Auto","version":"1.0","type":"link"}