dnewton3
Staff member
You might be misunderstanding my post... Let me explain some more. Leave "Efficiencies" out as that was not what I was talking about in any way. My point is that if you established an oil drain interval via UOA testing & it concluded that 10k was the time to change why pay for an 20k Ultra filter when a TG would work? That would be somewhat of a waste of money IMO assuming an Ultra costs more.
OK - so you're using the UOA data to establish an OCI, and then the filter is simply getting changed with the OCI; the FCI is just correlated with the OCI. So your precept is there is no sense paying for "more" filter than you're going to use. In that case, I would agree.
That doesn't negate the OPs question though ... 1 EG for a 10k mile OCI, or 1 Ultra for two OCIs ...
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