RETTOIL 10W40 CI-4 is a high-performance SAE 10W40 SHPD (Super High-Performance Diesel) engine oil designed for Extended Oil Drain Intervals (EODI). It is recommended for lubricating Euro IV, Euro V, and earlier turbocharged engines, both with and without intercoolers, as well as naturally aspirated engines equipped with after-treatment systems such as EGR valves and SCR catalysts.

RETTOIL 10W40 CI-4 is ideal for mixed fleets, delivery vehicles, long-haul trucks, agricultural and construction machinery, generators, high-speed marine diesel engines, and any application requiring a multigrade oil with maximum reliability, ensuring smooth cold starts, superior engine protection, and extended turbocharger durability.
Approved by the American Petroleum Institute (API), RETTOIL 10W40 CI-4 maintains optimal oil pressure at high temperatures while reducing the formation of lacquers, varnishes, and engine deposits, enhancing lubrication, durability, and overall reliability.