The sulfur content of diesel is another concern when it comes to engine performance. Any off-road diesel produced after 2014 must meet EPA standards for ultra-low-sulfur diesel (15 ppm). So if you’re purchasing fresh off-road diesel, you’ve got nothing to worry about.
Off-road diesel made before 2014 might have higher sulfur content though. If your diesel fuel is older, you should avoid using it in car engines from 2007 onwards. Since on-road diesel transitioned to ULSD in 2006, high sulfur diesel could damage emission controls and the engine.