That is low for an off-road vehicle where civilisation could be quite far away. My Suzuki and Chevy off-road vehicles are calibrated the same. My Buick thinks low is 24 miles of range.
(I'm probably - make that 'almost certainly' erring on the side of caution - having fitted a 90L/24USg auxiliary tank and also often carrying a jerry can or two when heading off into the boonies - heck, even my field kitchen runs on diesel!)