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hertfordnc's avatar
hertfordnc
Explorer
Nov 07, 2019

Cummins 5 year old synthetic oil with 1000 miles - change ?

Asking for a friend, (really) He has a 36 foot HR with a Cummins. He's broke and this is his primary residence. Other than switching campgrounds seasonally and pumping tanks he has no miles on the o...
Class A
11178adm's avatar
11178adm
Explorer
Nov 08, 2019
I would at least change the filter. if there was any moisture in the oil it could have caused the paper to deteriorate in 5 years. acid in the oil is'nt the problem that it was in the past due to ultra low sulfur diesel

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