{"product_id":"ats-chemical-505-cro-oil-system-treatment-12-oz-engine-oil-additive-for-sludge-removal-emissions-reduction-quiet-idle","title":"ATS Chemical 505 CRO Oil System Treatment — 12 oz Engine Oil Additive for Sludge Removal, Emissions Reduction \u0026 Quiet Idle","description":"\u003cp\u003e\u003cstrong\u003eATS Chemical 505 CRO Oil System Treatment is a 12 oz engine oil additive formulated to dissolve sludge, free sticky valvetrain components, reduce emissions, and help restore smooth idle and performance in gas and diesel engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned for use during an oil change or added to existing oil, this concentrated formula targets varnish and deposits that build up in high‑mileage engines. It works with conventional and synthetic lubricants and is meant to address common oil‑system blockages without requiring disassembly. Use as directed to improve oil flow, reduce mechanical noise, and help the engine run more efficiently.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this treatment clear sludge and varnish inside an engine?\u003c\/h3\u003e\n\n\u003cp\u003eThe formula contains solvents and detergents that break down hardened deposits and suspend loosened sludge so it can be drained out with the old oil. It loosens sticky rings and lifters by dissolving varnish that restricts movement, helping restore normal oil circulation.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eSolvent action dissolves baked-on varnish and softens sludge.\u003c\/li\u003e\n  \u003cli\u003eDetergents suspend contaminants for removal during the oil change.\u003c\/li\u003e\n  \u003cli\u003eCompatible with most gasoline and diesel engine oils when used per instructions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill ATS Chemical 505 reduce smoke and lower emissions?\u003c\/h3\u003e\n\n\u003cp\u003eBy cleaning oil passages and freeing sticking components, the treatment can reduce oil burning and incomplete combustion that contribute to visible smoke and higher tailpipe emissions. Results depend on the engine’s condition; severe internal damage may limit improvement.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eHelps reduce oil consumption that causes blue smoke.\u003c\/li\u003e\n  \u003cli\u003eImproves oil flow to emission‑sensitive components such as phasers and control valves.\u003c\/li\u003e\n  \u003cli\u003eCan contribute to steadier combustion when deposits are the primary cause.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan this product quiet noisy lifters, cam phasers, and rough idle?\u003c\/h3\u003e\n\n\u003cp\u003eYes—clearing varnish and restoring oil pressure to valvetrain components often reduces tapping and rattling noises and smooths idle. It’s most effective when noises are caused by restricted oil flow rather than worn mechanical parts.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eFrees sticking piston rings, lifters, and phasers to improve movement.\u003c\/li\u003e\n  \u003cli\u003eRestores operation of oil control valves and timing chain tensioners.\u003c\/li\u003e\n  \u003cli\u003eReduces noise by improving lubrication and hydraulic actuation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I use the 12 oz bottle and when will I see results?\u003c\/h3\u003e\n\n\u003cp\u003eAdd the recommended 12 oz dose to the crankcase during an oil change or into warm running oil as instructed on the label. Allow the engine to run for the specified soak period before draining so solvents can work; some users notice quieter operation and better responsiveness after one treatment, while heavier deposits may require repeated use.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eUse one 12 oz bottle per specified oil capacity—follow label dosing.\u003c\/li\u003e\n  \u003cli\u003eRun engine for the manufacturer’s recommended soak time before draining.\u003c\/li\u003e\n  \u003cli\u003eRepeat at intervals if severe deposits are present or as preventive maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: ATS Chemical 505 CRO is intended for owners and technicians servicing high‑mileage or deposit‑laden gasoline and diesel engines who want to address sticking valvetrain parts, reduce oil‑related smoke, and recover smoother idle and performance without teardown. It’s suitable for vehicles showing symptoms of restricted oil flow—noisy lifters, sluggish phasers, or elevated oil consumption—but not a substitute for repairs when mechanical wear or hardware failure is present.\u003c\/p\u003e\n\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is ATS Chemical 505 safe for turbocharged engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, when used as directed, it’s compatible with turbocharged gasoline and diesel engines and helps clear deposits that can affect turbo oil flow.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I add 505 CRO to existing oil between oil changes?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: You can add it to warm running oil for a soak, but follow label dosing and run the engine the recommended time before draining for best results.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"ATS Chemical","offers":[{"title":"Default Title","offer_id":48079880716446,"sku":"B0CYXTJ8P6","price":79.93,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/ats-chemical-505-front-label.jpg?v=1785774141","url":"https:\/\/northtrailauto.ca\/products\/ats-chemical-505-cro-oil-system-treatment-12-oz-engine-oil-additive-for-sludge-removal-emissions-reduction-quiet-idle","provider":"North Trail Auto","version":"1.0","type":"link"}