Originally Posted By: SilverFusion2010
I've seen Shell Rotella T4, T5, and T6 mentioned. What are the differences?
Here's the lineup as they announced last year for CK-4
T6 (Full Synthetic): 0W40 CJ-4, 5W30 CK-4 (Multivehicle), 5W40 CK-4
T5 (Synthetic Blend): 10W30 CK-4, 10W30 FA-4, 15W40 CK-4, 15W40 NGEO
T4 (Conventional): 10W30 CK-4, 15W40 CK-4
T3 (Fleet Grade): 15W40 CK-4, 15W40 NGEO
T2 (HD): 15W40 CK-4
T1: 10W CF, SAE 30 CF/CF-2, SAE 40 CF/CF-2, SAE 50, CF/CF-2