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jb-ob · 10-06-2019, 12:24 PM

Many reasons for 'black' oil but most over looked is the fact if your driving your Model A without an air filter, sucking up all the turbulent dirt off the highway.

Boat owners have 'clean' oil much longer...

10-06-2019, 12:24 PM	#21
jb-ob Senior Member Join Date: Jun 2010 Posts: 638	Re: ROTELLA 15W 40 Oil Many reasons for 'black' oil but most over looked is the fact if your driving your Model A without an air filter, sucking up all the turbulent dirt off the highway. Boat owners have 'clean' oil much longer...