WORK HARD. DRIVE HARDER.
LABOR DAY SALE: UP TO 20% OFF BY CATEGORY
No code needed — the right discount applies automatically at checkout, tiered by category.
Free "Work Hard // Drive Harder" tee on orders $200+, while supplies last.
Up to 20% Off, Tiered by Category
No code needed — the right discount applies automatically at checkout based on what's in your cart.
| Tier | Categories |
|---|---|
| 20% | Oil, air, cabin air and transmission filters. Wipers. All gas filters and gas filter kits. |
| 15% | Filter Kits. Oil + Filter Maintenance Kits. Fuel filters and separators. CCV filters. Detailing. |
| 10% | Brake kits, pads, rotors. Hubs. Transmission service kits. Additives. DEF. |
| 5% | Engine oil, transmission fluid, accessories, apparel. |
Free "Work Hard // Drive Harder" tee on orders $200+, while supplies last. One per order.
DIESEL ESSENTIALS
Explore our best-selling maintenance products by category.
Ram 6.7L Cummins Filter Maintenance Kit
2019–20245 filters: fuel ×2 · oil · air · cabin
Sale Price
$149.99
Ram 6.7L Cummins Filter Maintenance Kit
2013–20185 filters: fuel ×2 · oil · air · cabin
Sale Price
$147.99
Ford 6.7L Powerstroke Filter Combo Kit
2017–20194 filters: fuel · oil · air · cabin
Sale Price
$137.99
FREE TEE ON ORDERS $200+
Every order $200 or more automatically includes our limited-edition "Work Hard // Drive Harder" tee — one per order, while supplies last.
You'll pick your tee size right in your cart.
TOP 5 DEALS OF THE SALE
Labor Day Sale — FAQs
No. The right discount for what's in your cart applies automatically at checkout — no code needed.
The sale runs September 2–8, 2026. Any qualifying order placed before it ends gets the discount.
Discounts are tiered by category. Filters and wipers are 20% off; filter kits, maintenance kits, fuel filters and CCV filters are 15%; brakes, hubs, transmission service kits and additives are 10%; oil, fluids, accessories and apparel are 5%. See the tier table above for the full breakdown.
Add $200 or more to your cart and a free "Work Hard // Drive Harder" tee auto-adds — pick your size right in your cart. One per order, while supplies last. It's a limited one-time print run and isn't sold separately.
Sale pricing may not stack with other promo codes or offers. If you have a question about a specific order — including an active subscription — reach out to our support team and we'll help sort it out.
OVER 500,000+ HAPPY CUSTOMERS
★★★★★
“Doc's actually has some dang good filters, heck even their sticker pack actually comes with usable stickers that ain’t so small nobody notices them. Ordered fuel filters for my 2016 6.7 Cummins and Doc's sent updates for every step of the way, and they shipped to my house within 3 days. Cheaper than the parts store, noticeable quality, and shipped out the same day I ordered em. So overall nothing bad to say and will definitely be upgrading my fleet to all docs filters.”
TB Cattle CoVerified Buyer
★★★★★
“I did my oil change with y'all's 10 W 30 full synthetic with the hot shot secret with fuel filters and immediately knew the difference and sounded better. Ran better. I was getting 20 miles to the gallon now I'm upwards of 24. Absolutely getting this for the rest of its life and my next truck's life.”
Brandon H.Verified Buyer
★★★★★
“I use the filters and oil kits to service my fleet of trucks (4). I own a landscaping company and we are hard on our trucks, and it's nice to have a convenient way to buy the correct amount of oil and all filters in one place.”
Kameron C.Verified Buyer
★★★★★
“Easy to order, had a question got a call back very quickly and product was very nice stuff! Definitely will continue ordering my oil changes through docs 👍”
Dakota W.Verified Buyer
ENTER YOUR VEHICLE. WE'LL DO THE REST.