ACE3/optionals/compat_sog/CfgVehicles/tracked.hpp

// M41
class vn_armor_tank_base;
class vn_armor_m41_base: vn_armor_tank_base {
    EGVAR(refuel,fuelCapacity) = 530;
};

// Type 63
class vn_armor_type63_base: vn_armor_tank_base {
    EGVAR(refuel,fuelCapacity) = 545 ;
};