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You want an API "C" rated oil. CF is still in use and would be OK, but is really an obsolete spec. Best is to use an HDEO, and while rotella 10w-30 would likely be OK in your engine, a 40wt is really optimal.
Id personally run rotella or mobil 1 5w-40. Otherwise you can run the Rotella T5 10w-30 if temperatures do not get too hot, or a 15w-40. Dont just run any 10w-30, it lacks the proper detergents and dispersants to protect your engine from soot.
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