Don't know. If it's an "Ag" application, it might have a slightly higher detergent/dispersant package to take high dirt loads into account? (I'm trying to imagine ag-unique demands placed on oil.) I presume it's similiar -- if not the same -- as other mixed fleet, gas/diesel lubes. The Castrol website on this sub-brand should shed some light on same. As always, if there's an "SL" rating, it's perfectly fine to put in your Ford Mustang and Toyota pick-up as well, depending on weight.