NO GUESSWORK. ONE KIT.
Oil + Filter Maintenance Kit
High-Efficiency Media
Optimized Flow Rates
OEM Fit + Installation
No Guesswork. One Kit.
Each kit packs heavy-duty diesel oil and all the right filters to make maintenance fast, easy, and built for serious performance.
HEAVY DUTY DIESEL ENGINE OIL
Resists Viscosity Loss
Extreme Temperature Protection
Superior Thermal Stability
Low-Ash Formulation
All-Weather, No-Worries Protection
Delivers all-weather, stay-in-grade protection that flows fast in the cold and holds strong under heat and heavy loads.
WHAT OIL IS BEST FOR YOUR TRUCK?
15W-40 FULL SYNTHETIC
The classic heavy-duty diesel oil—tough, proven, reliable. Excellent for hot climates, towing, and high-load conditions. Fits most Cummins, Powerstroke, and Duramax setups with no issues.
5W-40 FULL SYNTHETIC
Best for cold climates since it flows better at startup. Go-to pick for modern turbo diesels like Duramax, Powerstroke, and Cummins. Approved by many OEMs for year-round use where cold starts are common.
10W-30 FULL SYNTHETIC
Provides slightly better fuel economy due to lower viscosity. Recommended by Cummins for some medium-duty trucks. Works best in moderate climates, but may not protect as well in high-heat/heavy towing compared to 15W-40.
15W-40 SEMI-SYNTHETIC
Budget-friendly option that still gets the job done. Offers less extreme temperature performance than full synthetic. Great for fleet trucks or regular oil change intervals.
Customer Reviews
I was able to get everything I needed in this kit for a really good price. Saved a lot of money where normally I would have to source everything at O'Reilly's or Napa. I was very happy with this kit everything was as it should be and it made it a breeze being able to have it all shipped right to the house. I will definitely be using Doc's Diesel from now on.
Great quality oil and filter kit! I appreciate having everything I need for routine maintenance in one convenient package. The kit is a great value and makes servicing my 6.7L Cummins much easier. I’m happy with the quality of the products and the convenience of ordering from Doc’s Diesel. I’ll definitely keep them in mind for future maintenance needs. Highly recommend to anyone looking to take good care of their Cummins!
Nice buying quality parts all in one kit.
Still have to finish up. Thank you Doc’s
I try to only use Docs filters on my Ram 3500, i have noticed the onboard computer going longer between changes with Docs filters. But i will say i was disapointed my last order did not have stickers....
Doc's Diesel RAM 6.7L Cummins 15W-40 Full Synthetic Oil + Filter Maintenance Kit 2013-2018
Great kit Going to be buying this kit for all my maintenance intervals
Everything got here fast! It was everything it said it was truck is running perfectly. I'll definitely be buying again
Quality parts and service, plus follow-up when next order is due.
Outstanding! Great bargain, fast shipping, high quality.
Very impressed
Doc's Diesel RAM 6.7L Cummins 15W-40 Full Synthetic Oil + Filter Maintenance Kit 2013-2018
Having these kids makes everything for the job you need to do on the truck. Simple and easy and there's no way around it
I think that it is the bang for the buck
Love to get my all in one service kit. Great value!
Good stuff will buy again
Ordered 15-40 but received 5-40.
Hey Anthony, I apologize for the mix up on your oil! I'd love to get this straightened out for you! Have you used those gallons of oil yet?
Awesome product everything fit as it should and I didn’t have to go out shopping for what I wanted, complete kit all in one package! Thanks doc’s diesel!
Can you get a filter kit with out the oil?
Hello Dustin!
Yes, you can!
We have the link here: https://docsdiesel.com/products/docs-ram-6-7l-cummins-filter-kit-fits-2013-2018
Thank you for your question!
Do you have a kit like this without the air filter?
Hey Jason, we offer this as a kit without the cabin air filter. Check out this link -> https://www.docsdiesel.com/products/docs-ram-6-7l-cummins-combo-filter-set-fits-2013-2018?_pos=4&_sid=c26a9acc9&_ss=r
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!