Description Shell Rotella T4 Triple Protection engine oil has been formulated to provide Triple Protection technology against wear, deposits, and oil breakdown. It uses advanced additive technology to protect under the most severe engine conditions found in modern, low-emission engines. Recommended by a wide range of OEM's, suitable for both the latest low-emissions and older model equipment. Shell Rotella Heavy Duty engine oil provides excellent protection in agriculture equipment as well as in pickups, especially during busy planting and harvesting seasons.