I was driving regularly down the road when I noticed the smell of electrical fire. Smoke started coming from the undercarriage of the truck. I pulled into a gas station, and the engine died, and I got out to look at what's causing the smoke. I observed what looked to be engine or transmission oil on fire dripping from the undercarriage, so I moved a safe distance from the vehicle, and within about 30 seconds, the entire vehicle was engulfed in flames. The fire department came, and extinguished the fire. The vehicle is 100% casualty, along with everything inside of it.