Why Every Diesel Owner Should Be a Diesel Diehard
If you're already popping the hood to swap your own filters, change your own oil, and keep your rig dialed in, you're doing the hard part. The easy part? Getting paid back for it.
That's exactly what Diesel Diehard, Doc's Diesel's loyalty rewards program, is built for. It's free to join, takes about thirty seconds to sign up, and turns the maintenance you're already doing into real savings on your next order.
What Is Diesel Diehard Doc’s Loyalty Club?
Diesel Diehard is Doc's Diesel's points-based loyalty program. Every time you shop, engage with Doc's online, or hit a milestone like your birthday, you earn Diesel Dollars, points that stack up and convert into discounts, exclusive deals, and even free gear.
No paid membership, no fine print. Just a rewards system built for people who are already buying filters, oil, and additives on a regular basis anyway.
How It Works
Getting started is simple:
Sign Up – Create a free account and sign up here
Earn – Rack up Diesel Dollars through purchases, reviews, referrals, and more.
Redeem – Cash in your Diesel Dollars for discounts, exclusive products, and limited-edition gear.
You'll bank 25 Diesel Dollars just for creating an account, before you've even placed your first order!
Ways to Earn Diesel Dollars
Diesel Diehard rewards more than just purchases. You can rack up points by:
Buying on docsdiesel.com
Referring a friend (they get $10 off a $50+ order, you get a $10 gift card)
Leaving a product review (every 7 days)
Following Doc's Diesel on Instagram or Facebook
Signing up for email or text alerts
Celebrating your birthday (50 Diesel Dollars, automatically)
Completing a quick survey
It adds up fast, especially if you're already following Doc's for product drops and maintenance tips.
Why This Just Makes Sense If You're Already Maintaining Your Truck
Here's the thing: routine diesel maintenance isn't optional. Between oil and filter maintenance kits, fuel and CCV filters, and oils and additives, most diesel owners are placing orders multiple times a year, no matter what. Why not get rewarded for something you’re already doing?
Whether you're running a 6.7L Cummins, a Powerstroke, or a Duramax, those maintenance intervals aren't going away. So the real question isn't whether you'll buy filters again, it's whether you'll get rewarded for it.
Diesel Diehard means every oil change kit, every set of filters, and every bottle of additive you were going to buy anyway now works double duty: it keeps your truck running right, and it stacks Diesel Dollars toward your next order. If you're already doing the work, you might as well get paid for it.
Even Easier: Put That Maintenance on Autopilot with Doc's Cruise Control
Earning Diesel Dollars is great. Never having to remember to place the order in the first place? Even better. That's where Doc's Cruise Control, Doc's Diesel's subscription program, comes in.
Set up Auto-Refill & Save on the filters and additives you already buy on a schedule, and Doc's ships them straight to your door right when you need them, always 5% off.
No last-minute parts runs, no forgetting a filter change, and every subscription order still earns Diesel Dollars just like a regular purchase. That's stacked savings: 5% off automatically, plus loyalty points on top.
Pick The Plan That Matches How You Drive
| Plan | Best For |
|---|---|
| Every 3 Months | Heavy haulers and high-mileage trucks |
| Every 6 Months | Daily drivers |
| Every 9 Months | Trucks that only see occasional use |
Most filters and additives are available on 3, 6, or 9-month subscription plans. Doc's Premium Beam Wiper Blades run a little longer, on 6, 9, or 12-month plans. Whichever plan you pick, it's fully flexible: pause, skip, or cancel anytime, no stress, no fine print.
Stack Your Savings. Set up a Doc's Cruise Control subscription on your regular filters and additives, keep earning Diesel Dollars on every shipment, and let your maintenance run itself.
Set Up Your SubscriptionA Quick Note for Military & First Responders
Doc's Diesel also offers an 11% Military & First Responder Discount through GOVX, which can be used alongside your Diesel Diehard account. Between the two, it's one of the most straightforward ways to lower the cost of keeping a diesel truck properly maintained. You can verify your eligibility here.
Sign Up in Under a Minute
There's no catch, no membership fee, and no reason to leave points on the table. If you're already ordering filters, oil, and additives from Doc's Diesel, Diesel Diehard just means getting more out of every order.
Join Diesel Diehard now and start earning Diesel Dollars on your next visit.
Want more maintenance tips, product comparisons, and platform-specific guides? Check out The Daily Rev, Doc's Diesel's blog, for everything from filter breakdowns to real customer stories.
Frequently Asked Questions
- Is Diesel Diehard free to join? Yes. There's no membership fee, just create a free account and start earning Diesel Dollars right away.
- Do Diesel Dollars expire? Diesel Dollars are valid for one year from the date they're earned.
- Can I combine Diesel Diehard rewards with the military discount? Not all promotions stack with every offer, so it's worth checking current terms, but Diesel Diehard and the Military & First Responder Discount are separate programs you can generally use together across different orders.
- How much does a referral earn me? You'll receive a $10 gift card for every friend who orders through your referral link (minimum $50 order on their end).
- Can I combine a Doc's Cruise Control subscription with Diesel Diehard rewards? Yes. Subscription orders through Doc's Cruise Control still earn Diesel Dollars, so you get the automatic 5% subscription discount and keep stacking loyalty points on every shipment.
Loyal to the diesel life?
Join Doc’s Diesel Diehard and rack up points, exclusive gear, and rewards just for doing what you already do.
How to Earn Points:
- Create an account
- Make a purchase
- Follow us on socials
- Leave a review
- And more!
