{"id":5244,"date":"2025-04-04T10:52:50","date_gmt":"2025-04-04T05:22:50","guid":{"rendered":"https:\/\/c38a2c2a6e.nxcli.io\/ca\/?page_id=5244"},"modified":"2025-07-21T13:20:23","modified_gmt":"2025-07-21T07:50:23","slug":"fuel-additives-faqs","status":"publish","type":"page","link":"https:\/\/stp.com\/ca\/maintenance-advice\/faqs\/fuel-additives-faqs\/","title":{"rendered":"Fuel Additives"},"content":{"rendered":"\t\t
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Home<\/a><\/span><\/span><\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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What is the difference between the old 12 oz. STP\u00ae<\/sup> Fuel Additives and the new 5.25 oz. Fuel Additives? Does the smaller bottle have the same strength? <\/h3><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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The updated STP\u00ae<\/sup>\u00a0Fuel Additive size works just as well as the old size, and still treats up to 21 gallons. Get all the power and performance in an easier-to-use package.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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Why do I need STP\u00ae<\/sup> Gas Treatment or STP\u00ae<\/sup> Fuel Injector & Carburetor Treatment? <\/h3><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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These fuel additives are referred to as \u201ckeep clean\u201d products. Just like waxing your car keeps the paint clean from building up dirt and chemicals in the rain and show, STP\u00ae<\/sup>\u00a0Gas Treatment and Fuel Injector & Carburetor Treatment help keep harmful deposits from building up in your engine\u2019s fuel intake system, including fuel injectors and carburetors. It is important to keep your fuel system free of deposits to maintain maximum performance. These STP\u00ae<\/sup>\u00a0products do not remove existing deposits. (See STP\u00ae<\/sup>\u00a0Super Concentrated Gas Treatment,\u00a0STP\u00ae<\/sup>\u00a0Super Concentrated Fuel Injector Cleaner<\/a>,\u00a0STP\u00ae<\/sup>\u00a0Octane Booster<\/a>\u00a0and\u00a0STP\u00ae<\/sup>\u00a0Complete Fuel System Cleaner<\/a>\u00a0for \u201cclean up\u201d products that help remove existing engine deposits, to help restore lost performance and efficiency.)<\/p>

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Why do I need the STP\u00ae<\/sup> Super Concentrated products (STP\u00ae<\/sup> Super Concentrated Gas Treatment and STP\u00ae<\/sup> Super Concentrated Fuel Injector Cleaner)? <\/h3><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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These fuel additives are referred to as \u201cclean up\u201d products and will dissolve harmful deposits that may have accumulated in your fuel system (including fuel injectors, intake valves and the carburetor). These are all sensitive parts of the fuel system that control the fuel\/air mixture and must remain deposit-free in order to work properly. By removing deposits in your fuel system, you can restore your vehicle to its optimum performance level, help maximize fuel efficiency, decrease hard starts, restore lost acceleration and decrease rough idling.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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Why do I need STP\u00ae<\/sup> Complete Fuel System Cleaner? <\/h3><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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The STP\u00ae<\/sup>\u00a0Complete Fuel System Cleaner is our most powerful fuel system cleaner. It not only does the job of our Super Concentrated products but helps clean the combustion chambers. The fuel system has the demanding job of delivering the proper fuel and air mixture to the engine, to give you the performance you need. Cleaning it twice a year can result in peak engine performance by restoring lost power and acceleration, maximizing fuel efficiency by cleaning fuel injectors and carburetors.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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Why do I need STP\u00ae<\/sup> Octane Booster? <\/h3><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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All engines develop combustion chamber deposits that can lead to your engine needing higher-octane gasoline than is recommended by the manufacturer to operate efficiently. This concept is known as \u201cOctane Requirement Increase\u201d or ORI for short. This can cause the \u201cknocking and pinging\u201d sounds you may hear when accelerating. The problem is that knocking and pinging may not be audible to the driver, due to many modern engines being equipped with knock sensors. These sensors detect knock and adjust the vehicle\u2019s timing to make it stop. These adjustments lead to a quieter engine, but do come at a cost, since they can result in slower acceleration and poor fuel economy. STP\u00ae<\/sup>\u00a0Octane Booster detergents help dissolve and remove existing deposits, so they can be swept into the combustion chamber and burn with the gasoline. With its cleaning ability, STP\u00ae<\/sup>\u00a0Octane Booster helps restore proper fuel flow to help restore lost performance and reduce hesitation and stumbling.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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How often should I use fuel additive products? <\/h3><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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The STP\u00ae<\/sup>\u00a0fuel additive\u00a0products<\/a>\u00a0are individually labeled for dose and treatment intervals. This information can be found on the back and neck labels of the bottle.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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How much gasoline will STP\u00ae<\/sup> fuel additive products treat? <\/h3><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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The STP\u00ae<\/sup>\u00a0fuel additive products are individually labeled for proper dosage. This information can be found on the back label of the bottle. Typically, our products treat between 14 and 21 gallons.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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Why do some car manufacturers recommend against the use of fuel additives in my car? <\/h3><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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Many car manufacturers state that after-market fuel additives are not necessary even though they sell their own brand of fuel additives. Some after-market fuel additives contain corrosive chemicals that may be harmful to fuel system components or internal engine parts. STP\u00ae<\/sup>\u00a0products do not contain any corrosive components, such as alcohols, and are safe for use in all engines.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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Are STP\u00ae<\/sup> products safe for diesel engine systems? <\/h3><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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STP\u00ae<\/sup>\u00a0has specially designed products for diesel engines and has labeled them as diesel products. They have been thoroughly tested in specific diesel applications.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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Are STP\u00ae<\/sup> products safe for four-cycle engines? <\/h3><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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The STP\u00ae<\/sup>\u00a0fuel additive products are specifically designed for use in four-cycle engines.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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Are STP\u00ae<\/sup> products safe for two-cycle engines? <\/h3><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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The STP\u00ae<\/sup>\u00a0fuel additive products have not been tested for use in two-cycle engines. Therefore, we do not recommend that they currently be used for two-cycle applications.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

What is the difference between the old 12 oz. STP\u00ae Fuel Additives and the new 5.25 oz. Fuel Additives? Does the smaller bottle have the same strength? The updated STP\u00ae\u00a0Fuel Additive size works just as well as the old size, and still treats up to 21 gallons. Get all the power and performance in an […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":4911,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-5244","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"\nFuel Additives - STP CA EN<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/stp.com\/ca\/maintenance-advice\/faqs\/fuel-additives-faqs\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Fuel Additives - STP CA EN\" \/>\n<meta property=\"og:description\" content=\"What is the difference between the old 12 oz. STP\u00ae Fuel Additives and the new 5.25 oz. Fuel Additives? Does the smaller bottle have the same strength? 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