Hot Shot's Additive + Detailers

Doc's x Hot Shot's Secret Additives + Detailers

Proven Chemistry, Inside and Out.

When two names diesel folks trust team up, you get this collection. Doc's Diesel partnered with Hot Shot's Secret—one of the most proven names in diesel additives—to bring their formulas into the Doc's family, alongside a full line of detailing products for keeping the outside as sharp as the engine runs strong. Whether you're chasing smoother shifts, cleaner injectors, faster cold starts, or a scratch-free shine after a week on the job, everything here is powered by chemistry that's been tested, verified, and run hard in real trucks. Protect it. Clean it. Keep it looking like you care—because you do.

The Additives: Powered by Hot Shot's Secret.

This is Hot Shot's proven chemistry wearing the Doc's label. The Diesel Treatment goes in every tank—boosting cetane for cold starts and combustion, restoring lubricity, cleaning injectors, and dispersing water at just 1 to 2 ounces per 25 gallons. Interval Fuel Treatment is the deep clean: it scrubs cylinders, fuel lines, and the tank, knocks out internal diesel injector deposits (IDIDs), boosts cetane up to 7 points, and can cut DPF regeneration cycles by up to 50%. Interval Oil Treatment attacks the problem Hot Shot's built its name on—stiction—removing 50% more than competitors (verified by third-party ASTM testing) while reducing wear up to 62% and protecting turbos, injectors, and rings. The Shift does the same for your automatic transmission, dissolving gum and varnish to smooth out erratic shifting and reduce operating temps. And when winter shows up, The Winter Treatment is a 7-in-1 anti-gel that keeps fuel flowing down to -40°F. Want the full program? Grab a combo kit and treat fuel, oil, and every tank in one order.

The Detailers: Because a Work Truck Shouldn't Look Like One.

Your truck earns its dirt—but it doesn't have to wear it. The detailing side of this collection covers the full wash bay: The Foam wash-n-wax for a deep clean that leaves protection behind, The Degreaser for the caked-on grime that regular soap won't touch, The All Purpose Cleaner for interiors and everything in between, The Quick Detailer for touch-ups between washes, and The Dressing to bring rubber, vinyl, plastic, and tires back to life. Or skip the piecing-together and grab The Diesel Detail Kit—all five products in one box for a brilliant, scratch-free shine on any diesel.

Trusted Formulas. Straight Directions. No Guesswork.

Every additive in this collection comes with a clear treatment plan—exact ounces per gallon, premium and performance dosing, and when to use it—so you're never guessing at the ratio on the side of the road. The claims aren't marketing fluff either: the numbers behind these formulas come from third-party ASTM testing and decades of Hot Shot's Secret development in hard-working diesels. Safe for Cummins, Powerstroke, Duramax, and EcoDiesel trucks, and built to slot right into your existing Doc's filter and maintenance routine. No guesswork. No BS.

Free Shipping on All U.S. Orders $99+

A truck that runs strong and looks sharp is worth protecting on both fronts. Pair a fuel treatment with a detail kit, stock up before winter, or add a bottle of The Shift to your next filter order—every order over $99 ships free anywhere in the U.S. Run clean. Shine hard. That's the Doc's x Hot Shot's way.