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 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
“SDS §2 classifies Eye Damage/Irritation Category 2A (H319) at the mixture level · aerosol mist is the primary exposure pathway.”
— Gasoila
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
“SDS §2 classifies Skin Irritation Category 2 (H315) at the mixture level · brief incidental contact during spray application is the typical exposure; prolonged or repeated contact is the relevant trigger.”
— Gasoila
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
“SDS §2 classifies STOT SE Category 3 (H335, respiratory irritation) and Acute Toxicity Inhalation Category 4 (H332) at the mixture level · aerosol mist from spray application is the primary inhalation exposure pathway.”
— Gasoila
U.S. regulatory standard
29 CFR 1910.134(a); 1910.1200(f)
“The employer shall assess the workplace to determine if hazards are present, or are likely to be present, which necessitate the use of personal protective equipment.”
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 #6 of 15 in Penetrating Oil / Multi-Purpose Lubricant.Three above it ↓
Last reviewed June 14, 2026
TL;DR DANGER-rated aerosol with a Prop 65 warning for cancer and reproductive toxicity · a Prop 65-listed chemical in the carrier is confirmed on the SDS §15 and product label. owners broadly confirm reliable penetration on seized fasteners. Aerosol mist in enclosed spaces is the primary inhalation concern.
Free-All penetrates corroded threads and breaks rust's grip on seized fasteners. The thin, fast-wicking formula reaches tight clearances above average for this category, and owners broadly and consistently describe reliable release on stuck bolts and rusted pipe connections. Community reviews confirm results on light-to-moderate rust within 10·20 minutes. A residual film protects against re-seizure for several weeks. Silicone-free and paint-safe per SDS chemistry.
A solid reach for home mechanics and farm or industrial maintenance users with occasional stuck-fastener work. Anyone applying penetrating oil regularly in enclosed spaces should use this outdoors or with genuine ventilation · aerosol mist is the primary inhalation risk, and the DANGER classification and Prop 65 warning compound with repeated exposure.
DANGER signal word driven by an aspiration hazard if swallowed · do not induce vomiting if ingested, seek medical attention. Prop 65 warning for cancer and reproductive toxicity: a Prop 65-listed chemical in the carrier is confirmed on SDS §15. The SDS classifies respiratory irritation and harmful-if-inhaled at the mixture level; aerosol mist from spray application is the primary inhalation pathway. Eye and skin irritation also classified at mixture level. Environmental: one petroleum distillate ingredient is aquatically toxic at the ingredient level. VOC estimated ~255 g/L. Not rinse-off · residue stays on treated fasteners.
The Safety Data Sheet for Gasoila Free-All Deep Penetrating Oil carries a DANGER signal word, with classified hazards including H222 (extremely flammable aerosol); H280 (contains gas under pressure; may explode if heated); H229 (pressurized container: may burst if heated). The Amazon listing also carries a California Prop 65 warning. See the PPE breakdown above for use-case-specific guidance translated from the SDS hazard codes.
CarCareTruth scores Gasoila Free-All Deep Penetrating Oil at 5.9 out of 10 on the composite CCT score, with a health sub-score of 3.0/10. The CCT score blends real-world effectiveness, ingredient health impact pulled from the manufacturer's safety sheet, and environmental footprint against a published category rubric. See the methodology link on this page for the full scoring breakdown.
Per the Safety Data Sheet ingredient disclosure: SDS §3 (rev. 2025-12-02): Carbon Dioxide (CAS 124-38-9) 0.1·10%; Distillates, petroleum, hydrotreated light (CAS 64742-47-8) 5·15%; Petroleum Oil, hydrotreated heavy naphthenic (CAS 64742-52-5) 25·35%; Oleic Acid (CAS 112-80-1) 25·35%; Methyl Isobutyl Ketone (CAS 108-10-1) 15·25%.
Marketing copy from Gasoila, via Amazon. Not editorial.
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