Quicksilver Heavy Duty Diesel Engine Oil SAE 15W-40Multigrade SAE 15W-40 diesel engine oil, formulated to meet heavy duty requirements and to combat sludge and varnish formation. Contains a higher additive level than standard fleet oils and provides greater protection under severe operating conditions or where fuel quality is poor.Protects better than standard fleet oils. Use of this oil will: Provide outstanding wear and corrosion protection which help extend engine life Control soot, deposits and oil thickening Prevent sludge and varnish deposits Meets or exceeds specifications for: CH-4, CG-4, CF-4, CF-2, SJ, SH Meets or exceeds OEM approvals for: Mercury® non-TDI diesel applications, Volvo® VDS®, Caterpillar® CD/TO-2, Cummins®, Detroit Diesel®, And other diesel engines