Description QUICKSILVER DIESEL OIL H/D 15W40 4LT. Heavy Duty Diesel Engine Oil has been formulated to meet heavy-duty diesel requirements while combating sludge and varnish formation. This oil contains a higher additive level than standard fleet oils and provides greater protection under the most severe operating conditions, extended service, or poor fuel quality. This shear stable multigrade formula provides excellent water tolerance in addition to controlling deposits.
