Originally Posted By: kam327
Originally Posted By: 2010_FX4
Originally Posted By: kam327
I'm well aware of 2010_FX4's data. First of all he used PU not PP. Second of all, it proves my point. At an OCI of 7,305 PU had a TBN of 5.4. At a lower OCI of 6,480 MS5K's TBN was less than half that. Once MS5K wears out PU will keep on chugging for several thousand more miles.
Everything you said is true, but PU would have to run for double the MS5K OCI to break even on cost and you would have to perform a oil filter change in there somewhere (unless you use a higher end filter which increases the overall cost). Can PU last 20,000+ miles?
I completely agree with you. All I said was PU would last several thousand more miles than MS5K, not that it would go double the miles, or even 50% more.
I think dinos have a lower overall cost per mile because synthetics' price premium does not correlate with an equal OCI premium. Exactly what you said.
See my recent thread on "TBN depletion" to see my argument, comparing MCSB to PU. Getting pounded on by the dino haters!
I agree. I buy syn when its on sale. As a result I've likely got more than I will ever use however over the years a good conventional has proven to lead an engine to a long life.
If I had an engine that required a specific spec then I would of ourse find an oil that met that spec,however I don't,and the oil vie got is probably overkill in my applications.
But I'm an oil hoarder,yes I can admit it.