Hot Shot's Secret Diesel Extreme Fuel System Cleaner, 16 oz — Cetane Boost & Deposit Removal

Hot Shot's Secret Diesel Extreme is a concentrated 16 oz fuel system cleaner formulated to remove deposits, water, and sludge while improving cetane for cleaner, more efficient diesel combustion.

Designed for diesel engines of trucks, SUVs, and heavy equipment, this premium additive works through the entire fuel system to restore performance and reliability. The formula contains cumene and other agents that tackle varnish, carbon buildup, and emulsified water, helping engines start easier and run smoother without the need for mechanical disassembly. Packaged in a compact 16 oz bottle, Diesel Extreme treats multiple tanks and is made in the USA, making it a convenient preventive maintenance step between professional services.

How does Diesel Extreme clean the whole fuel system?

Diesel Extreme circulates through fuel lines, injectors, and combustion chambers to dissolve and flush out accumulated deposits. It combines surfactants and detergents with a cetane-boosting ingredient so combustion becomes more complete and deposits are less likely to reform.

• Breaks down carbon, varnish, and sludge on injectors and intake passages
• Emulsifies and helps remove free and suspended water from fuel
• Improves cetane rating for steadier ignition and burn

What real performance benefits can I expect?

Regular use can lead to easier cold starts, stronger mid-range acceleration, and reduced sputtering or rough idling caused by clogged injectors. While individual results depend on engine condition and fuel quality, many users notice smoother throttle response and fewer hesitation events after treatment.

• Improved cold-start reliability and cranking
• Smoother acceleration and reduced throttle lag
• Cleaner combustion that can help lower visible smoke and emissions

How do I use the 16 oz bottle and how many tanks will it treat?

The product is concentrated; add the recommended dose directly to the fuel tank before filling, allowing it to mix and circulate. One 16 oz bottle treats multiple tanks depending on tank size and dosage rate, making it suitable for routine maintenance rather than one-time overhaul.

• Add per label dosage to fuel tank prior to filling for best mixing
• Treats several tanks in passenger trucks; follow instructions for heavy-duty tanks
• Safe to use with diesel engines, including those with modern emissions systems when directions are followed

Is Diesel Extreme compatible with modern diesel engines and emissions systems?

The formula is designed for use in contemporary diesel engines and supports cleaner combustion without altering engine hardware. As with any additive, follow the product directions and consult your vehicle’s manufacturer recommendations if you have specific warranty or emissions concerns.

• Formulated for use in late-model and older diesel engines
• Does not require engine modifications or special tools
• Manufactured in the USA to meet quality and consistency standards

Who is this for? Diesel Extreme is ideal for diesel vehicle owners who want an easy, preventive maintenance step to reduce deposits, improve starting and throttle response, and protect fuel system components. It suits pickup truck and SUV drivers, fleet managers seeking routine maintenance solutions, and owners of agricultural or construction equipment who need reliable performance between services. If your engine shows signs of sluggish starts, hesitation under load, or visible smoke, a concentrated fuel system cleaner like Hot Shot's Secret Diesel Extreme offers a practical first step before more invasive repairs.