CarCareTruth Score
Decent, but it's tough on the environment.
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Prices may varyThe manufacturer's Safety Data Sheet classifies this product with one or more GHS Category 1 health hazards — the most severe tier. The hazard statements in quotes below are the verbatim GHS language from the SDS, as required by OSHA's Hazard Communication Standard. The line under each statement translates the GHS classification into plain language.
GHS Category 1 aspiration toxicity — thin, oily liquids can slip into the lungs if swallowed, causing chemical pneumonia.
If swallowed:
The aspiration hazard (H304) is about the liquid being swallowed and reaching the airway, not about breathing fumes during normal use.
Call Poison Control immediately at 1-800-222-1222 (US, 24/7, free) and have the product container with you. Poison Control's standing guidance is to not induce vomiting after chemical exposure; they will direct first-aid steps based on the specific product.
About this product's hazards. This product's Safety Data Sheet uses signal word DANGER.Read the manufacturer's SDS and follow all safety instructions before use. CarCareTruth ratings translate the manufacturer's safety sheet. They do not replace the SDS or substitute for a hazard assessment specific to your task.
Health score is for adult use as intended, per the manufacturer's SDS. It does not model child ingestion, accidental spill cleanup, or off-label use. See the safety panel below for full hazard classification, and /disclaimer for the full editorial scope.
GHS hazard codes are quoted from the manufacturer’s Safety Data Sheet. PPE tiers below translate those codes and the listed ingredient chemistry; they are not CarCareTruth recommendations.
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Translated from the manufacturer’s Safety Data Sheet, Section 2
SDS Section 2 classifies Eye irritation Category 2A (H319). Standard consumer bottle poured into a narrow fuel-tank fill neck makes drip-back and splash realistic during the pour.
U.S. regulatory standard
29 CFR 1910.133(a)(1)
“The employer shall ensure that each affected employee uses appropriate eye or face protection when exposed to eye or face hazards from… liquid chemicals…”
ANSI Z87.1 (incorporated via §1910.6)
OSHA standards apply to workplaces. Cited here as the U.S. reference threshold for the underlying hazard class.
CarCareTruth publishes the cited sources verbatim and does not advise what action a user should take. Consult the full SDS before use.
Only when: splash risk
Translated from the manufacturer’s Safety Data Sheet, Section 2
SDS Section 2 classifies Skin irritation Category 2 (H315). Brief accidental drip contact during a standard pour is the exposure pathway; sustained contact is unlikely from a one-time pour-in treatment.
U.S. regulatory standard
29 CFR 1910.138(a)
“appropriate hand protection when employees' hands are exposed to hazards such as those from… chemicals which produce an adverse effect on the skin or eyes…”
OSHA standards apply to workplaces. Cited here as the U.S. reference threshold for the underlying hazard class.
CarCareTruth publishes the cited sources verbatim and does not advise what action a user should take. Consult the full SDS before use.
Translated from the manufacturer’s Safety Data Sheet, Section 2
SDS Section 2 classifies Specific target organ toxicity - single exposure Category 3, covering both respiratory irritation (H335) and narcotic effects (H336). The carrier is a naphtha/distillate blend with a flash point of 48.89°C, and the SDS Section 8 respirator clause ('in case of vapour formation use a respirator with an approved filter') is a real, non-boilerplate trigger given the confirmed inhalation hazard codes; a garage or other semi-enclosed pour location concentrates vapor beyond the outdoor case.
U.S. regulatory standard
29 CFR 1910.1000; 1910.1200
“Each employer shall assure that no employee is exposed [in excess of the PEL]…”
OSHA standards apply to workplaces. Cited here as the U.S. reference threshold for the underlying hazard class.
CarCareTruth publishes the cited sources verbatim and does not advise what action a user should take. Consult the full SDS before use.
The published Safety Data Sheet for this product does not specify ventilation protection for consumer use.
Workplace context
29 CFR 1910.134(a); 1910.1000
“the primary objective shall be to prevent atmospheric contamination [via] accepted engineering control measures (for example, enclosure or confinement of the operation, general and local ventilation, and substitution with less toxic materials).”
Triggered by GHS H335 on the SDS.
OSHA standards apply to workplaces. Cited here as the U.S. reference threshold for the underlying hazard class.
PPE tiers translate the manufacturer’s SDS and U.S. regulatory standards. Not professional safety advice. How we report safety.
Scope of these PPE tiers. The tiers on this page translate the product's Safety Data Sheet where one is published, plus its ingredient chemistry, into a comparable rating. They describe a formulation, not a situation: a tier is not a safety determination for any specific user, task, quantity, or environment. The manufacturer's label and use instructions govern how the product is handled. Where the product is used at work, the employer's PPE program and hazard assessment under 29 CFR 1910.132 decide what protection is selected, not this page.
No warranties. CarCareTruth makes no warranties, express or implied, and expressly disclaims the implied warranties of merchantability and fitness for a particular purpose.
This product ranks #5 of 9 in Fuel System Cleaner.Three above it ↓
Last reviewed July 31, 2026
TL;DR Fuel system chemistry built on PEA (polyether amine), confirmed at 20-30% directly in the US SDS. That reaches injectors and intake valves; the brand's carburetor, pump, and friction claims go beyond it. Health 5.0/10: DANGER signal word from aspiration, skin, eye, and respiratory hazard codes, plus a Prop 65 warning at concentrate strength.
Positioned for high-mileage engines (75K+ miles), this uses a PEA-class detergent the US SDS discloses at a real concentration range, not just marketing copy. PEA has the most independent research behind it for injector and intake-valve deposits, which this formula credibly reaches through the fuel path. Broader claims, like restoring performance, reducing friction, and protecting carburetors and pumps, go past the disclosed chemistry, since no separate lubricity or combustion-chamber additive is named. One 12 oz bottle treats up to 18 gallons, used every 5,000 miles.
Best for higher-mileage, port-fed gasoline engines that ran non-Top-Tier fuel and want a periodic detergent top-up. Skip it on Top Tier gasoline, which already limits this buildup. Skip it for misfires or injector failure beyond typical fouling; that needs professional service, not a pour-in additive. Diesel and carbureted-only owners should skip it too; GDI owners shouldn't expect intake-valve benefit, since fuel never washes those valves on a true GDI engine.
SDS Section 2 lists DANGER: aspiration hazard, skin and eye irritation, respiratory irritation, and a suspected inhalation carcinogen. Do not induce vomiting if ingested; seek medical attention. Eye protection and, in an enclosed garage, a respirator are warranted. A Prop 65 warning applies, confirmed on the SDS and the label. It combusts in the engine; exhaust is the environmental endpoint.
The brand claims it revitalizes injectors, pumps, and carburetors and restores lost engine performance for high-mileage vehicles. The active detergent is PEA (polyether amine), confirmed directly in the US SDS at 20-30% concentration, a stronger disclosure than many category peers, where the active is often only indicated from a secondary source. PEA-class chemistry credibly reaches fuel injectors and intake valves through the fuel path; no combustion-chamber-specific co-active is named in the disclosed ingredients, so the wider friction-reduction and full-system claims go beyond what the confirmed chemistry supports on its own.
The listing does not make a GDI or direct-injection claim at all. Its marketing language references injectors, pumps, and carburetors, which describes port-fed fuel delivery rather than direct injection. A tank-poured additive travels through the fuel path and cannot reach the intake valves on a true GDI engine, since fuel there is injected directly into the combustion chamber and never washes over the valves. Treat any GDI intake-valve benefit as unaddressed by this product.
The bottle is labeled specifically for gasoline engines. No diesel-compatible formulation or claim appears on the listing or label, so this product should not be used as a substitute for a diesel-specific fuel system cleaner.
The label states one 12 oz bottle treats up to 18 gallons of gasoline, added before a fill-up, with a recommended use interval of every 5,000 miles. That is a periodic-maintenance protocol rather than a one-time flush, and the label and brand messaging agree on the dosing.
Yes. Both the SDS (Section 15) and the physical bottle label carry a California Proposition 65 warning tied to minor aromatic components of the petroleum-distillate/naphtha carrier blend, even though the product listing itself does not surface a Prop 65 flag.
Marketing copy from Valvoline, via Amazon. Not editorial.
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