I'm happy with this!
Blackstone report on my 15 RAM Dually towing 33-35K, about 1/2 of the miles were towing. AMZ/OIL 15-40 100 percent synthetic with FleetGuard Stratapore filter. No oil was used with this 15K report...
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I am impressed with the viscosity numbers as they are on the top end of "Should Be" after 15K. I am sure my TBN number last change was higher than this time because I added 1 qt last change and added nothing this time.
