Flex Fuel Trucks That Run E85

What to know about flex fuel trucks

Pickups are where flex fuel lasted longest. General Motors has kept the 5.3L V8 Silverado and Sierra E85-capable for more than two decades, which makes the half-ton GM twins the easiest used FFVs to find in any state. Ford matched that coverage on the F-150 from 2006 until it dropped flex fuel after the 2024 model year — but only on naturally aspirated engines such as the 5.4L Triton, 5.0L Coyote, 3.7L and 3.3L V6. No EcoBoost F-150 is a factory FFV.

Ram and the imports are narrower. Ram 1500 flex fuel trucks used the 4.7L V8 (2004–2008) and later the 3.6L Pentastar V6 (2011–2018, continuing on the Ram 1500 Classic); the HEMI was never certified for E85. Toyota offered flex fuel only on the 5.7L Tundra, Nissan on the 5.6L Titan as an option rather than standard equipment, and the 2016/17–2019 Frontier 4.0L V6 only in federal-emissions states.

Mid-size and older compact trucks round out the list: the Dodge Dakota (2007–2011), Ford Explorer Sport Trac, and the 1999–2003 Ford Ranger / Mazda B3000 twins with the 3.0L Vulcan V6. Those early trucks were fleet-heavy and often carry no exterior flex fuel badge at all.