Hot Shot's Secret Oils & Additives

About Hot Shot's Secret

Hot Shot's Secret is a diesel lubricant and additive brand founded in 1997 and based in Mount Gilead, Ohio, where its products are made and shipped. The line covers engine oil, transmission fluid, gear oil, fuel additives and coolant built for diesel pickups and the trucks that tow with them.

What we carry

We stock 53 Hot Shot's Secret products. All of them are shelf items with no fitment to check:

• Engine oil: Black Diamond Outlaw 15W-40 full synthetic CK-4, Adrenaline R-Series 15W-40 and 20W-50 racing oils, and FR3 Friction Reducer oil additive.
• Transmission fluid: Blue Diamond Dexron VI/Mercon LV, Type F and G56 Severe Duty SAE 50 manual fluid, plus Adrenaline Pro Shift +4 and Speed Shift.
• Gear oil: Blue Diamond 75W-90 and 85W-140 HD synthetic for towing, plus Adrenaline 80W-110 and 85W-140 synthetic racing gear oil.
• Fuel additives: Diesel Winter Rescue emergency fuel additive and other diesel treatments.
• Coolant: 750,000 Mile Heavy Duty Ultra Long Life red coolant.

Read the spec on each oil before you buy. Some grades are built for racing and equipment, not a daily-driven pickup. Match the grade or spec your owner's manual calls for.

Shop by engine

Hot Shot's Secret fluids are not engine-specific, so there is no year, make or model to match. For the rest of your truck, shop parts by engine: Cummins, Duramax or Powerstroke. Not sure it fits? Use the Fits-your-truck checker on any product page, or text your VIN to (352) 722-5295 and a tech at our Wildwood, FL shop will confirm it.