CarCareTruth Score
Decent, but it's tough on the environment.
Opens Amazon in a new tab. No account needed to look.
Saved to your guest loadout. Sign up to also save to your Cabinet (consumables) or Kit (tools you own).
As an Amazon Associate I earn from qualifying purchases. Full disclosure
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.
Show details for all categories ▾Hide details ▴
Only when: splash risk
Translated from the manufacturer’s Safety Data Sheet, Section 2
No H318 or H319 in SDS section 2 mixture classification. H304 (aspiration) is not an eye hazard. DANGER signal word is from H304, not H318. Situational due to splash risk during concentrate pour into fuel tank opening or gas can.
CarCareTruth publishes the cited sources verbatim and does not advise what action a user should take. Consult the full SDS before use.
Only when: prolonged use
Translated from the manufacturer’s Safety Data Sheet, Section 8
H315 (skin irritation Cat 2) appears in SDS section 3 at ingredient level but NOT at section 2 mixture classification. Back label says 'Avoid skin contact' as a precautionary label statement consistent with the petroleum distillate carrier. Skin irritation risk is from extended handling of concentrate, not brief pour contact.
CarCareTruth publishes the cited sources verbatim and does not advise what action a user should take. Consult the full SDS before use.
Only when: in enclosed space
Translated from the manufacturer’s Safety Data Sheet, Section 2
H304 (aspiration hazard) drives the DANGER signal word at mixture level. high_voc is confirmed from the 90-95% petroleum distillate fraction (estimated greater than 550 g/L VOC). H335 (respiratory irritation) does NOT appear in SDS section 2 mixture classification, and H336 (STOT SE 3) is at ingredient level only with no deduction. Per rubric: high_voc without H335 in section 2 mixture classification supports situational tier. Pour in a well-ventilated area or outdoors.
U.S. regulatory standard
29 CFR 1910.1200(f); 1910.132(d)
“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.
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.
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 #1 of 4 in Fuel Stabilizer.
Last reviewed June 12, 2026
TL;DR Community reviews from boat, motorcycle, and small-engine owners confirm solid single-season E10 protection; multiple owners report 12-20 month storage, though the 24-month claim is not corroborated. The 1 oz per 16 gallon treat rate is outstanding for the category. H304 aspiration hazard is in the SDS; do not induce vomiting if ingested and seek medical attention.
Star Tron uses a proprietary enzyme blend in a petroleum-derived solvent carrier to prevent fuel oxidation and degradation from ethanol-blended pump gas. The manufacturer claims 24-month protection; community evidence confirms reliable single-season use with credible 12-20 month reports from marine and small-engine owners. The label targets E10 phase separation, and no E10 failure pattern has been documented in the owner community. At 1 oz per 16 gallons, the dose rate is one of the most economical in the category.
Best for small-engine owners, motorcycle riders, and boat operators storing equipment 4-10 months, particularly those treating large fuel volumes. Skip if storing for under a month; short-duration storage does not require stabilization.
DANGER signal word is driven by H304 (aspiration hazard from the petroleum-derived solvent carrier); do not induce vomiting if swallowed and seek medical attention. High estimated VOC warrants ventilation when pouring. No Prop 65 substances confirmed in SDS section 15. H411 chronic aquatic toxicity is classified at ingredient level; dispose of unused concentrate via fuel or chemical recycling, not down the drain.
The manufacturer claims up to 24 months. Community evidence from boating and small-engine forums confirms reliable single-season protection (6-10 months) consistently. Multiple owners report successful 12-20 month storage in generators, outboards, and motorcycles, though independently corroborated multi-year outcomes are limited. For confident seasonal storage through a typical winter, the evidence is solid.
Yes. The label explicitly targets ethanol fuel problems and phase separation prevention. No verified community reports of E10 phase separation failures were found in owner community research at time of authoring. The proprietary enzyme blend is not disclosed in the SDS, so the active chemistry cannot be independently verified.
1 oz treats 16 gallons for regular use (from the product label). This is one of the most economical treat rates in the category; an 8 oz bottle treats 128 gallons.
Yes. The manufacturer explicitly states it is safe for all engines including 2-cycle pre-mix. This is confirmed on the product listing and manufacturer website.
Marketing copy from Star brite, via Amazon. Not editorial.
Weekly pick
One product, one safety verdict, every week. No spam.
PRI-G
Complete Gasoline Treatment
Yamaha
Yamalube Outboard Fuel Stabilizer & Conditioner Plus
Gold Eagle Co.
STA-BIL Storage Fuel Stabilizer
Ethanol Shield
Fuel Stabilizer
As an Amazon Associate I earn from qualifying purchases. Full disclosure
Community
0 postsShare how you use this product
Drop a quick comment or post a full review with photos and a star rating.
Sign in to postNew here? Create a free account.