Question best oil for 2003 7.3

Akpaul

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with rotella 5w40 syn. I change mine every 10,000 miles. Got 224,000 on on it now and still going strong.
 

wilson111

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my 02 7.3 gets rotella 15w40 and mc filters, change between 3&5,000 miles..165,000 miles and weighs 18,125lbs..since brand new! my 09 get the mc oil and filter, i have the service plan so the dealer does it.
 

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