dirtroad2ExplorerNov 17, 2014oil for cummins 8.3I have a Monaco diplomat with a cummins 8.3L I was told to use Rotella 15-40 W Can I use Rotella 5-40w synthtic
64thunderboltExplorer IINov 17, 2014absolutely and your eng will thank you & repay you with better cold starts and long life.
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