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DIESEL TRUCK MAINTENANCE MADE EASY.
Doc’s Diesel is your trusted online source for premium maintenance parts built specifically for Cummins, Powerstroke, Duramax, and EcoDiesel trucks. From filters and brakes to full oil kits, we make it easy to get the right parts without the inflated prices you’ll find at dealerships or parts stores.
Whether you're a weekend wrench or a full-time heavy hauler, Doc’s helps you skip the markup, avoid the breakdowns, and keep your truck running strong—all without wasting time chasing parts.
DIESEL TRUCK MAINTENANCE MADE EASY.
Doc’s Diesel is your trusted online source for premium maintenance parts built specifically for Cummins, Powerstroke, Duramax, and EcoDiesel trucks. From filters and brakes to full oil kits, we make it easy to get the right parts without the inflated prices you’ll find at dealerships or parts stores.
Whether you're a weekend wrench or a full-time heavy hauler, Doc’s helps you skip the markup, avoid the breakdowns, and keep your truck running strong—all without wasting time chasing parts.
Customer Reviews
Customer Reviews
After ordering many filters I’ve always used power service
Filters were great so I decided to try this treatment
I drive a 6.7 Powerstroke and I wanna keep my CP4 pumping for miles to come. Doc's makes it super easy with The Diesel Treatment. I ordered it online and had it to my house in just a couple of days. I don't even have to focus on pouring the right amount because this bottle makes it easy. Fill up the measuring area and dump it in! Much better, than the old additives I used to run!
I poured the diesel treatment into my fuel tank and after a little bit of driving noticed a big difference in acceleration with the infamous 6.0 Powerstroke. Now when I get in the left lane the truck definitely gets around the traffic a lot better.
I’ve been using Doc’s since I bought my 2016 Freightliner Cascadia 2 yrs ago, my def usage went from 220 mpg to 350+ mpg ! And zero regens , now THATS a product that works ! Been recommending it to my teammates.
Okay,just used it
Really have been enjoying this product over the last month. Driver 300 miles a days for work and I’ve seen my fuel increase 2 mpg to make it to 22mpg.
Increase in fuel mileage by 3. Wools great
Granted this may be internet hype but the word is "run an additive" to protect the pumps in the fuel system. For a fairly small investment I figure it can't hurt.
Pretty much hopped on board with all the Doc's products and kits so I hope they work out well.
I'll be running this, Doc's Oil, and I just ordered the Transmission Service Kit.
Very important in keeping fuel components working properly
Already used Hot Shot Secret. When I found out they partnered with Doc's it was a no brainer.
FREQUENTLY ASKED QUESTIONS
What’s your shipping policy?
We offer free shipping over $99 on all orders within the contiguous United States. Expedited shipping is available for an additional charge. Alaska, Hawaii, and Canada will have shipping fees.
Where does Doc’s Diesel ship to?
We ship to the U.S. and Canada! For Canada orders, any taxes, duties, or customs fees are the responsibility of the buyer. We handle orders in 1-2 business days, and most of the time in less than 24 hours if ordered on a week day. Depending on location, U.S. orders will arrive between 3-5 business days from your order. Canada orders typically arrive within 7-11 days.
What is your warranty?
View our Official Limited Warranty
Doc’s Diesel Filters meet or exceed Original Equipment Manufacturer’s (OEM) requirements. New vehicle warranties stay in effect when Doc’s Diesel filters are installed correctly and in conjunction to engine manufacturer’s recommendations.
Where is my order?
If you have not received your confirmation email us sales@docsdiesel.com so we can get everything sorted out ASAP. If you received a confirmation but no shipment email, we are still working on your order. Don't hesitate to email sales@docsdiesel.com if you would like more information and we'd be happy to check on your order. Please Include your order # in the email.
For Tracking information, it will be in your shipment email. Check the tracking # first or the latest updates. Doc's Diesel, just like you are at the mercy of shipping companies after a shipment leaves our warehouse. If there's been an issue with shipment we will happily work with you to figure out where the order is and what we can do to help. You can reach out to sales@docsdiesel and include your order # in the email. Thank You!
Why didn’t I get a confirmation email?
Sometimes an email may get sent to your spam folder! So don’t forget to check that. If you need more help to hesitate to reach us at sales@docsdiesel.com.
How do I start a return?
If you are unhappy with your purchase for whatever reason, and it's within 30 days from your purchase, you can return your diesel filters back to us. Item has to be in new condition. Once filters are received, we will refund your money (minus price of return shipping) within 2-4 business days. We will refund to your original form of payment.
To start a return, visit our Returns Center.
View Our Official Limited Warranty Policy
Thank you!