1. You scoff at trucks when you realize they’re gassers.
2. You’ve drag raced your diesel truck.
3. You have your right rear view mirror tilted down so you can “admire” the smoke from your tailpipe.
4. You’ve hooked up and towed a trailer, just because you CAN.
5. You love the smell of a truck stop parking lot more than fresh brewed coffee.
(To read the full list that includes more than 40 signs you might be a Diesel Head, check out the original source You know you’re a “diesel head” if….).