Doc's Diesel x Hot Shot's Secret Interval Oil Treatment (32oz)

10 Reviews
Regular price$34.95
  • 3rd-Party Tested
  • Free USA Shipping Over $99*
  • In stock, ready to ship
  • Inventory on the way

Doc's Diesel & Hot Shot's Secret are partnering to bring their #1 stiction removal product to the Doc's Family with Interval Oil Treatment, Powered By Hot Shot's Secret. This Complete oil treatment deep cleans vital engine components of stiction, varnish, and other deposits to increase diesel engine performance. Not only does Interval Oil Treatment improve power and fuel economy, but it also reduces engine wear by using a patented nano lubricant to extend the life of your engine.

- Protects Turbos, Injectors, & Rings
- Removes 50% more stiction than competitors (verified by 3rd party ASTM Testing)
- Reduces Wear up to 62%
- Cleans & Lubricates
- Quicker Turbo Spool Times
- Improves Fuel Economy

Treats the symptoms of:
- "Failing" HEUI Injectors
- Black Smoke
- Hard Starts
- Weak Turbo Boost

Treatment Plan: Use 2oz of Interval Oil Treatment per 1 qt of oil. Include in your scheduled maintenance plan and add to your oil with every oil change for best results

Note: Product displaces equivalent amount of oil. Ensure overall oil level does not exceed fill levels. Formulated to be kept in during the entire life of your oil. For example if your truck calls for 16 qts, use 15 of your oil and then the full bottle our 1 qt Interval Oil Treatment

How much is shipping?

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.

How long will it take to get my Doc's Diesel Filters?

We handle orders in 1-2 business days (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.

Where is my order?

If you have not received your confirmation email us 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 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 happilly work with you to figure out where the order is and what we can do to help. Once again you can reach out to sales@docsdiesel and include your order # in the email. Thank You.

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. Email us and we will email you a return slip. 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 email

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industry leading aftermarket diesel filters


Aftermarket Filters - OEM Form, Fit & Function.


Free shipping on all Continental USA orders over $99. Expedited Shipping Available.


If it doesn’t fit, we will offer you a replacement or a refund (*some conditions apply).


Doc's Diesel Filters are spec'd and designed to meet or exceed the quality/performance of the original filters (OEM's) that come in your vehicle. Doc's premium grade media filter paper used on all Doc's Filters is what sets Doc's above the rest.

3rd Party Tested ✓

We wanted to go one step further in customer trust by providing,SAE J1985 3rd Party Testing of our parts.We did a full upstream and downstream efficiency testing along with a single pass efficiency test method. Our main fuel filters have been 3rd party tested, and as we get more testing we will be reporting the results.

Customer Reviews
4.9 Based on 10 Reviews
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Filter Reviews:
Joshua SVG verified by SHOP
United States United States

So far so good no ticks in the motor and the cummins is still running strong

Michael C.
United States United States

It good. its like putting a quart of oil in the truck.

Tim M.
United States United States

Customer Service

I had a problem with a delivery and contacted Doc's customer service. They handled the problem quickly and shipped me out replacement material quickly! Great team at Doc's! If you haven't tried Doc's you should give them a try! High quality products and great customer service, all at great pricing. Its a WIN WIN!

Steven W.
United States United States

First time user

I received my order very quickly and was impressed with the quality.

Cody L. Brown
United States United States

Good product maybe a little too pricey.