Doc's Diesel Cetane Boost + All-in-One Additive — 16 oz (Treats 400 gal), Cleans Injectors & Restores Lubricity

Doc's Diesel 24/7 Cetane Boost + All-in-One Additive is a daily-use diesel treatment that raises cetane, cleans injectors, restores lubricity and helps control moisture for reliable operation.

Designed as a single-bottle solution for routine maintenance, this 16 oz concentrate treats up to 400 gallons and is formulated for diesel pickups, work trucks, fleets and heavy equipment. It addresses common ULSD shortcomings—lower lubricity and cetane—while providing detergency and moisture control so engines start easier, throttle response stays consistent, and fuel-system wear is reduced.

How does this additive improve cold starts and ignition?

Doc's Diesel increases cetane rating by up to +7 points, which improves the ignition quality of diesel fuel. Higher cetane helps fuel burn more completely and can shorten ignition delay, making cold starts and low-temperature operation smoother.

• Boosts cetane up to +7 points for better ignition quality
• Promotes more complete combustion for steadier idle and throttle response
• Useful in diesel engines from Powerstroke, Cummins, Duramax to CAT and Detroit Diesel

Will this product protect injectors and fuel pumps?

Yes—this formula combines detergents and lubricity additives to reduce injector deposits and replenish lost lubrication left by ULSD. That combination helps limit wear on high-pressure pumps and injectors, supporting long-term fuel-system reliability.

• Cleaner injectors reduce spray pattern distortion and misfires
• Restored lubricity protects moving parts in pumps and injectors
• Safe for common diesel platforms and heavy-duty hardware

How does it handle water and microbial concerns in fuel?

Doc's Diesel contains components that help disperse excess water and make conditions less favorable for microbial growth, reducing risk of corrosion and biological contamination in tanks. Regular dosing helps maintain a more stable fuel environment between fills.

• Helps disperse free and emulsified water in the fuel
• Reduces conditions that promote microbial growth and corrosion
• Supports cleaner fuel tanks and lines with routine use

What is the correct dosing and how easy is it to use?

The product is designed for simple, predictable dosing: add the measured amount before fueling. Use 1 oz per 25 gallons for standard maintenance, or 2 oz per 25 gallons when you want enhanced performance or are preparing for cold conditions or heavy loads.

• Standard dose: 1 oz per 25 gallons—regular maintenance
• Enhanced dose: 2 oz per 25 gallons—for extra cetane and protection
• One 16 oz bottle treats up to 400 gallons when used at standard dose

Who is this for? Doc's Diesel 24/7 Cetane Boost + All-in-One Additive is aimed at diesel vehicle owners and fleet managers who want a straightforward, multi-purpose fuel treatment for everyday use. It’s appropriate for pickup drivers, contractors, fleet operators and equipment owners who need improved cold-start behavior, deposit control, restored lubricity and basic moisture management without juggling multiple products.