Overlanders traveling to Guatemala with modern Diesel engines have one additional concern on top of their mind: the availability and quality of Diesel. — An overview As of 2023, Guatemala does have some Ultra Low Sulfur Diesel (ULSD) but most Diesel sold is at 500 ppm. However, the meaning of ULSD in Guatemala is a bit different. In other words, ULSD is considered anything with a sulfur content below 50 ppm. As a comparison, in USA…