Clean agents don’t have the same stopping power until you get up to 11lb and above(need that A rating)5lb abc works but is really corrosive to electrical components. PK or BC will cover your needs, plus cheaper on the maintainability.
Someone who actually knows what they are talking about. I ran sales for Ansul one of the leading fire protection manufactures and for a fuel fire a PK would be best unless one wants to haul around an AFFF wheel unit.