AMSOIL Diesel Oil vs. Shell Rotella T6 — Heavy-Duty, Signature Series Max-Duty, and What Actually Changes
Rotella T6 is the default oil for a lot of diesel guys, and it’s not a bad oil. AMSOIL actually has two tiers that compete with it — Heavy-Duty Synthetic and Signature Series Max-Duty. Here’s what the actual data sheets say about all three.