Cat C-7 diesel oil viscosity
I have a 2004 Cat C-7 in a 36' Meridian which I have been using Rotella 15W-40 oil in it since new 68,000 miles back. Seems I remember reading somewhere the thought was that 10W-30 was better for the...
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This is what CAT recommends for my C-7 so it is what I use. CAT does not recommend synthetic oil because its primary selling point is extended change intervals. CAT recommends changing every year regardless of mileage or every 1100 gallons of fuel burned so synthetic has no advantage.
Jim
Jim
