CarCareTruth Score
Decent, but wear gloves and ventilate.
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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 skin corrosion — classified as causing irreversible skin damage on contact.
GHS Category 1 eye damage — classified as causing irreversible eye damage on contact.
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
“H314 (Skin Corr. 1A) and H318 (Eye Dam. 1) from SDS §2. GHS05 corrosive pictogram. Splash goggles are required by the SDS classification.”
— Meguiar's
U.S. regulatory standard
29 CFR 1910.133(a)(1); 1910.151(c)
“The employer shall ensure that each affected employee uses appropriate eye or face protection when exposed to eye or face hazards from… liquid chemicals, acids or caustic liquids…”
ANSI Z87.1 (chemical splash protection — 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
“H314 (Skin Corr. 1A) from SDS §2. Strongly alkaline chemistry (pH 12.5-13.5) causes severe skin burns at concentrate strength. Chemical-resistant nitrile gloves are required by the SDS classification.”
— Meguiar's
U.S. regulatory standard
29 CFR 1910.132; 1910.133; 1910.138; 1910.151(c)
“Where the eyes or body of any person may be exposed to injurious corrosive materials, suitable facilities for quick drenching or flushing of the eyes and body shall be provided within the work area for immediate emergency use.”
ANSI Z87.1 (eye/face — 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
“No inhalation H-code at mixture level in SDS §2. Water-based alkaline formula with no volatile solvents. The enclosed_space trigger applies when spraying into a sealed engine bay without ventilation; outdoor or open-garage use does not require respiratory protection per the SDS chemistry.”
— Meguiar's
CarCareTruth publishes the cited sources verbatim and does not advise what action a user should take. Consult the full SDS before use.
No PPE specified in published sources for ventilation. Absence does not imply “not needed” — consult the full Safety Data Sheet.
PPE tiers translate the manufacturer’s SDS and U.S. regulatory standards. Not professional safety advice. How we report safety.
This product ranks #9 of 11 in Engine Degreaser.Three above it ↓
Last reviewed June 14, 2026
TL;DR Cuts through heavy engine-bay grease at 4:1 dilution, with owner reports confirming one-pass removal on neglected bays with brush agitation. The DANGER signal word (H314 corrosion classification) means the chemistry is genuinely corrosive at working concentration. Nitrile gloves and splash goggles are required by the SDS classification, not optional caution.
A professional-line alkaline concentrate for engine bays, tires, and wheels. At 4:1 dilution it handles baked-on motor oil and ATF residue that lighter cleaners leave behind. Owner reports confirm one-pass removal on neglected engine bays with brush agitation. The rinse is a real differentiator: where many alkaline degreasers leave white film, this one rinses cleanly under a garden hose. At 10:1 it works as a tire and wheel cleaner. Available in 1-gallon and 5-gallon concentrate.
The right call for an owner with a genuinely grimy engine bay who is comfortable using DANGER-classified chemistry with proper protective gear. Skip it for a lightly dusty daily-driver engine bay, where a milder biodegradable cleaner handles the job without corrosive chemistry. Avoid prolonged full-strength contact on bare aluminum.
DANGER signal word driven by H314 (Skin Corr. 1A) at concentrate strength. The SDS classification requires nitrile gloves and splash goggles. No inhalation H-codes at mixture level; work outdoors or with garage doors fully open. No 2-butoxyethanol, no PFAS, no volatile solvents. The surfactant system carries ingredient-level aquatic chronic hazard. Amazon flags Prop 65 but no SDS §3 ingredient matches the Prop 65 substances list.
The label recommends 4:1 (water to product) for heavy grease and engine bay work, and 10:1 for lighter cleaning like tires and wheel wells. Owner reports confirm 4:1 handles neglected engine bays in a single pass with brush agitation.
At 4:1 dilution, owner reports confirm no damage to rubber, plastic, or painted engine covers. Avoid prolonged full-strength contact on bare aluminum. The H290 metal corrosion classification in the SDS means reactive metals can be affected on extended contact.
Yes. The SDS classifies this product with a DANGER signal word and H314 (Skin Corr. 1A), which means severe skin burns and serious eye damage are possible at concentrate strength. Nitrile gloves and splash goggles are required by the SDS classification.
Yes, at 10:1 dilution. Owner reports confirm effective removal of road grime and brake dust from tires and wheels. It also handles concrete oil stains well at full strength.
Available in 1-gallon (D10801) and 5-gallon (D10805) containers. Both are concentrate, so the per-ounce cost at working dilution is competitive with ready-to-use alternatives.
Marketing copy from Meguiar's, via Amazon. Not editorial.
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