Shell ROTELLA® T5 10W-30 Synthetic Blend is suitable for a wide range of heavy-duty engine applications. With its wide range of specifications and approvals from many of the worlds leading engine makers it is an excellent choice for on-highway fleets construction agriculture and diesel pick-up trucks including high-power vehicles where resistance to increased heat and stress is required. Triple Protection Plus is the unique combination of Triple Protection and Shell Pure Plus Technology. Shell Pure Plus Technology is a process that produces a 99.5% pure base oil which allows proprietary additives to work at maximum strength. This unique combination provides optimum protection as well as increased fuel efficiency and reduced maintenance costs on the road. Shell ROTELLA® T5 10W-30 Synthetic Blend works even harder than new CK-4 specifications require. It is proven to provide excellent performance across API CK-4 wear tests delivering an average of 44% better than the maximum wear requirements. In extensive real world field testing over 500000 miles and with long drain intervals Shell ROTELLA® T5 10W-30 Synthetic Blend proved that a thinner viscosity can protect as well as Shell ROTELLA® T4 Triple Protection® heavy duty engine oil 15W-40.