Doc's Diesel

Winter Flow 24/7 Diesel Treatment + Cetane Boost

$23.99
Doc's Diesel 24/7 Diesel Treatment + Cetane Boost

Free 24/7 Diesel Treatment on Your 2nd Subscription Order

Order 1

Your subscription starts, delivered on your schedule.

Order 2

Includes a free bottle of 24/7 Diesel Treatment, on us.

  • Free USA Shipping
    Over $99*

  • Fitment
    Guaranteed

  • 30-day Money
    Back Warranty

  • Military & First Responders Save 11% with GOVX

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Doc's Diesel Winter Flow 24/7 Diesel Treatment + Cetane Boost

Beat the Cold Snap

Make it a winter kit

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  • Free shipping on orders $99+
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VEHICLE FITMENT
INTERCHANGE

FOUR JOBS. EVERY FILL-UP.

Improves Cold Starts

Improves Cold Starts

Prevents Fuel Gelling & Icing

Prevents Fuel Gelling & Icing

Boosts Cetane

Boosts Cetane

Lubricates Fuel System

Lubricates Fuel System

Prevents Gelling

Stops wax from forming in cold diesel so fuel keeps flowing all winter.

Boosts Cetane

Faster ignition and smoother cold starts, even on the coldest mornings.

De-Ices Filters

Keeps water contamination from freezing your filter and starving the engine.

Customer Reviews

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!