Oil, Additives + Fluids
FILTERS
Doc's Diesel
Doc's x Hot Shot's Secret The Shift Automatic Transmission Protectant + Cleaner
32oz Bottle
Doc's Diesel
Doc's x Hot Shot's Secret THE WINTER TREATMENT Diesel Anti-Gel Additive
16oz Squeeze Bottle
Collection Details 
Premium Diesel Oils, Transmission Fluids, Additives + More
Doc’s Diesel delivers premium diesel oils and additives to keep your truck running smoothly. Shop oils, transmission fluids, or more. Give your vehicle the Diesel Treatment with Doc's collection of premium oils, fluids, and other additives + treatments designed to keep your car running smoothly and efficiently. We wouldn't be your one-stop shop if we didn't offer cleaning and detailing supplies. Check out our collection of detail kits, tire dressings, and cleaners designed to keep your car or truck sparkling clean at all times. Shop now!
JOIN THE CLUB
Doc’s Diesel Diehard rewards you for doing what you already do — keeping your truck dialed. Earn points on every order, unlock exclusive deals, and get access to limited gear and must-have Doc’s products. Real perks for real diesel folks.
JOIN THE CLUB
Doc’s Diesel Diehard rewards you for doing what you already do — keeping your truck dialed. Earn points on every order, unlock exclusive deals, and get access to limited gear and must-have Doc’s products. Real perks for real diesel folks.
BECOME A DOC'S DEALER
Join the Doc’s Wholesale Dealer Program for exclusive product discounts, free fast shipping, and guaranteed OEM fitment, plus a custom dealer pack when you sign up.
SAVE $$$
Exclusive Access to Dealer Website with Wholesale Prices
FREE FAST SHIPPING
Shipped in Under 24 Hours, Monday through Friday
EXCLUSIVE DEALER PACK
You’ll Get a Bundle of Doc’s Merch On Us
BECOME A DOC'S DEALER
Join the Doc’s Wholesale Dealer Program for exclusive product discounts, free fast shipping, and guaranteed OEM fitment, plus a custom dealer pack when you sign up.
SAVE $$$
Exclusive Access to Dealer Website with Wholesale Prices
FREE FAST SHIPPING
Shipped in Under 24 Hours, Monday through Friday
EXCLUSIVE DEALER PACK
You’ll Get a Bundle of Doc’s Merch On Us