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40 Deluxe · 11-27-2019, 03:47 PM

If you're wondering about "dirty" your oil is, just send off a sample for a real analysis. Without seeing/feeling/smelling your oil, no one on this site can give an informed opinion, anyway! Look online for an analysis company, or ask a heavy equipment or truck dealer.

11-27-2019, 03:47 PM	#14
40 Deluxe Senior Member Join Date: May 2010 Location: now Kuna, Idaho Posts: 3,779	Re: Rotella T4 oil, dirty oil If you're wondering about "dirty" your oil is, just send off a sample for a real analysis. Without seeing/feeling/smelling your oil, no one on this site can give an informed opinion, anyway! Look online for an analysis company, or ask a heavy equipment or truck dealer.