Shell’s legacy commercial engine oils (prior-generation CJ‑4 and CI‑4) were formulated to protect heavy-duty diesel engines under high stress and soot conditions, delivering reliable wear control and deposit management. While superseded by newer CK‑4/FA‑4 oils, they remain recognized for their proven performance in older fleets.
Shell Rotella DD+ 40
Shell Rotella DD+ 40 is a high-performance SAE 40 engine oil developed specifically for two-stroke Detroit Diesel engines, offering low-ash formulation, strong wear protection, and advanced detergent technology.
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