Marvel Mystery oil??? to use or not to use in brand new diesel??

[yzf1999]

Every 5k miles for the oil for both gas and diesel engines… I changed my fuel filters out on my diesel truck every 5k miles also.

 

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GM 3.0 Duramax Fuel system cap Magnetic Green - Grab one through Amazon!

[Carterfamilyfarm]

perfect thank you i always did 7500 in my ford for last two trucks so i appreciate the suggestion, have a great day!