Cummins OnaMax™ 10W-30 1 QT A063E183 Cummins Onan Generator Oil
(326-5339 is now obsolete) SAE30 replaced with 10W-30
Cummins is transitioning from SAE30 (326-5339) to SAE10W-30 (A063E183) oil blend starting Q2 2020. This change will align with industry oil standards for small gasoline engines. Cummins manufacturers and ships gasoline and LP powered Onan RV generators using SAE10W-30 oil blend. In addition to the new oil blend, Cummins is still offering the SAE15W-40 for small diesel RV generators.
