Hot Shot's Secret Everyday Diesel Treatment (EDT)
Priced as of May 17, 2026
4.7(8,675 ratings)Subscribe & Save: $17.33 (5% off)Buy on AmazonSaved to your guest loadout. Sign up to also save to your Cabinet (consumables) or Kit (tools you own).
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Prices may varyFrom the Safety Data Sheet
Full SDS ↗ (rev. 2026-01-13)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.
EyesRecommendedMfr. SDS §8 · 29 CFR 1910.133(a)(1) · GHS H319SkinSituationalMfr. SDS §8 · 29 CFR 1910.138(a) · GHS H315LungsRecommendedMfr. SDS §8 · 29 CFR 1910.134(a) · GHS H332Ventilation—No PPE in published sourcesShow details for all categories ▾Hide details ▴
From the manufacturer’s Safety Data Sheet, Section 8
“H319 (eye irritation Cat 2) in SDS §2 — the concentrate pour from a squeeze bottle creates realistic splash risk at the tank fill neck.”
— Hot Shot's Secret
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 — brief accidental drip contact during the standard tank-side pour.”
— Hot Shot's Secret
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
“2-EHN at 50-75% with mixture-level H332 (harmful if inhaled). Outdoor pour adequate per SDS §8; garage or enclosed fueling area concentrates vapors from the aromatic naphtha and 2-EHN carrier.”
— Hot Shot's Secret
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.
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.
CarCareTruth's Analysis
Last reviewed May 17, 2026
TL;DR 2-EHN cetane improver confirmed in SDS §3 at 50-75% with strong community corroboration on idle smoothness and cold-start improvement across 8,675 reviews at 4.7 stars. Detergent and lubricity actives are trade secrets — the "6-in-1" claim cannot be independently verified beyond the cetane function. Health lands in the Serious Hazard band (4.2/10) from mixture-level H302 and H332 driven by the high 2-EHN concentration, plus Prop 65 listings for ethylbenzene and naphthalene.
What it is and how it performs
EDT uses 2-ethylhexyl nitrate — the most independently studied cetane improver — at a concentration the brand describes as sufficient for up to a 7-point cetane boost. Higher cetane reduces ignition delay, smooths idle, and eases cold starts. The brand markets injector cleaning and lubricity protection through a proprietary package called LX4, but both actives are trade secrets with no independent test data. Community evidence is strongly positive: #1 bestseller in Amazon Diesel Additives with consistent reports of smoother throttle response after the first treated tank. Dose at 1-2 oz per 25 gallons at every fill-up from a graduated squeeze bottle. Not an anti-gel product — a separate EDT+ Winter Defense SKU handles cold weather.
Who should buy this — and who should skip it
Best for diesel owners running non-Top-Tier fuel who want a dedicated cetane boost at every fill-up. Skip it if your fuel already meets EN 590 cetane minimums from a Top Tier supplier, or if injector cleaning is the primary goal — the trade-secret detergent cannot be independently evaluated.
Safety and environmental impact
The SDS classifies this mixture with a WARNING signal word. H302 (harmful if swallowed) and H332 (harmful if inhaled) appear at the mixture level from the 2-EHN concentration at 50-75%. H373 (organ damage through repeated exposure) applies from the aromatic naphtha and xylene carrier fraction. SDS §15 lists Prop 65 warnings for ethylbenzene and naphthalene (both cancer). The concentrate pour into the diesel tank fill neck is the primary exposure window. Estimated VOC exceeds 550 g/L. Naphthalene carries documented aquatic toxicity at the ingredient level.
Frequently asked questions
How much Hot Shot's Secret EDT should I use per tank?▾
The label specifies 1 oz per 25 gallons for standard treatment, or 2 oz per 25 gallons for increased cetane and lubricity benefit. The 16 oz squeeze bottle treats up to 400 gallons at the standard rate. Pour directly into the fuel tank before filling.
Is Hot Shot's Secret EDT safe for all diesel engines?▾
The brand states it is designed for all diesel engines including Tier 4 compliant equipment. The ashless formulation avoids metallic-additive concerns. No documented community-reported compatibility issues have been found for CRDI or older mechanical injection engines.
Does Hot Shot's Secret EDT contain anti-gel protection?▾
No. EDT is a warm-weather and all-season maintenance treatment. For cold-weather anti-gel protection, Hot Shot's Secret offers a separate EDT+ Winter Defense product with wax-crystal modifier chemistry.
What is the difference between Hot Shot's Secret EDT and Diesel Extreme?▾
EDT is designed for every-fill-up maintenance dosing (1-2 oz per 25 gallons). Diesel Extreme is a concentrated one-tank deep-clean treatment for symptom-driven use — higher detergent concentration for severe injector fouling. They address different needs: EDT for prevention, Diesel Extreme for remediation.
Does Hot Shot's Secret EDT improve fuel economy?▾
The brand states that the cetane improvement from 2-EHN can improve fuel economy. Community reviews report modest MPG improvements, but results vary by engine, fuel quality, and driving conditions. Cetane improvement reduces ignition delay, which can contribute to more complete combustion.
From the manufacturer
Marketing copy from Hot Shot's Secret, via Amazon. Not editorial.
- •EVERYDAY TREATMENT: Keep your diesel engine in top condition with our EDT that is designed to improve performance & maintain engine health. With regular use, you can ensure your engine runs smoothly & efficiently giving you peace of mind on the road.
- •BOOST FUEL ECONOMY: Enhance your vehicle performance with our diesel additive that boosts cetane levels by up to 7 points resulting in better fuel economy & reduced maintenance costs. Say goodbye to poor acceleration & frequent trips to the mechanic.
- •FUEL INJECTOR CLEANER: Cleans both internal & external injector deposits, enhances the lubricity of fuel to safeguard the fuel system components, such as the pump & injectors to increase engine longevity while also acting as a fuel system cleaner.
- •PREVENTS RUST & CORROSION: While demulsifying moisture & adding stability to fuel by preventing oxidation & degradation, it also provides a reliable solution for protecting fuel systems from the damaging effects of rust & corrosion.
- •EASY TO USE: Use at every fill-up, 1 oz. or 2oz. (for more cetane and lubricity boost) for every 25 gallons of diesel, this product is easy to use! Just pour it into your diesel fuel tank during your next fill up.
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Manufacturer videos
Manufacturer images
Manufacturer specifications
- Brand
- Hot Shot's Secret
- Item Volume
- 473 Milliliters
- Unit Count
- 1.0 Count
- Number of Items
- 1
- Item Weight
- 16 ounces
- Contains Liquid Contents?
- Yes
- Brand Name
- Hot Shot's Secret
- Global Trade Identification Number
- 00799493815900
- Manufacturer
- Lubrication Specialties, Inc
- UPC
- 799493815900
- Model Number
- HSSEDT16ZS
- Part Number
- HSSEDT16ZS
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Top Amazon review
↗External — Amazon's most-helpful review for context.
Great diesel treatment for everyday use
I use this Hot Shot’s Secret Everyday Diesel Treatment for my diesel truck, and it has been a great product to keep on hand. The 1-gallon size is a good value because it treats a lot of fuel and makes it easy to use regularly. I like that it is made for everyday diesel maintenance, not just occasional use, and it gives me extra confidence that I am taking better care of the fuel system. A very practical product for diesel owners who want something reliable for regular use.