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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...
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Chum_lee's avatar
Chum_lee
Explorer
Nov 08, 2019
Normally I'm not a fan of testing oil, (in lieu of changing it) but in this case, he could spend +-$40.00 and have the oil tested by a lab to see if it's fit for continued use.

Or there's the oil blotter test using a clean white business card for free.

https://www.machinerylubrication.com/Read/499/blotter-spot-method


Chum lee

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