CarCareTruth Score
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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, inhaled, or splashed in eyes:
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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From the manufacturer’s Safety Data Sheet, Section 8
“H319 (eye irritation Cat 2A) in SDS §2 mixture-level classification. Standard consumer bottle poured into a narrow fuel-tank fill neck makes drip-back and splash realistic during the pour.”
— CRC
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.
From the manufacturer’s Safety Data Sheet, Section 8
“H315 (skin irritation Cat 2) in SDS §2. No H317 skin sensitizer present. SDS §11 states 'not expected to cause skin sensitization.' Brief drip contact during the standard pour is the realistic exposure scenario.”
— CRC
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.
From the manufacturer’s Safety Data Sheet, Section 8
“H335 (respiratory irritation) in SDS §2 mixture level. No single named aromatic carrier reaches the rubric's 5% individual-disclosure threshold (solvent naphtha light aromatic tops out at 3-5%), so this tier rests on the pour being realistically likely in a garage or covered parking rather than always outdoors. Flash point 47.2°C confirms a volatile carrier.”
— CRC
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.
This product ranks #10 of 10 in Fuel System Cleaner.Three above it ↓
Last reviewed July 7, 2026
TL;DR CRC Motor Treatment relies on a solvent and light-oil carrier, not a named detergent active; no PEA, PIBA, or Mannich-base chemistry appears on the SDS. It markets itself as a fuel-and-oil treatment, but with no independent evidence and mixed owner sentiment, the multi-system cleaning claim is unverified. DANGER signal word and a Prop 65 warning apply at the pour.
The SDS lists solvent carriers and a light lubricating-oil fraction, with no disclosed detergent chemistry class that independent fuel-additive research validates for injector or combustion-chamber deposits. The oil fraction plausibly supports the brand's claim of lubricating engine components and dispersing moisture from fuel, but the combustion-chamber and injector cleaning claims rest on brand positioning, not a confirmed detergent package. Labeled as a one-time pour-in treatment; the label does not distinguish a separate maintenance dose.
Best suited to owners wanting a general-purpose additive for occasional moisture control, not buyers seeking documented deposit removal. Owners who consistently run Top Tier certified fuel already get a baseline detergent package and see little added value here. Skip if the vehicle shows misfires, rough idle, or injector failure beyond routine carbon buildup; that calls for professional fuel-system service. Skip for carbureted engines unless compatibility is confirmed.
DANGER signal word, driven by an aspiration hazard, skin and eye irritation, respiratory irritation, and a suspected-carcinogen classification. Do not induce vomiting if ingested; seek medical attention. Eye and inhalation protection are worth having at the pour step; the SDS also carries a Prop 65 warning. The product combusts in the engine; exhaust byproducts are the environmental endpoint, not wastewater.
No. The SDS discloses the full ingredient list (Stoddard solvent, 2-butoxyethanol, paraffinic distillates, and several aromatic solvents), and none of them is a named detergent chemistry class (PEA, PIBA, or a Mannich-base amine) that independent fuel-additive research validates for injector or combustion-chamber deposits. The cleaning action here is generic solvency rather than a targeted detergent package.
Yes, more so than the deposit-cleaning claim. The formula includes a paraffinic-oil fraction consistent with a light lubricant, plus 2-butoxyethanol, a water-miscible glycol ether solvent commonly used to disperse water into fuel rather than let it pool. That combination has a plausible chemistry basis for the moisture-dispersal and lubrication claims specifically.
The SDS classifies the concentrate as DANGER based on an aspiration hazard, skin and eye irritation, respiratory irritation, and a suspected-carcinogen classification, driven by the Stoddard-solvent and aromatic-naphtha carriers, not by the paraffinic-oil fraction. The Prop 65 warning traces to five listed substances in the SDS: benzene, cumene, ethylbenzene, naphthalene, and toluene, each present at a minor fraction of the formula.
Marketing copy from CRC, via Amazon. Not editorial.
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