Originally Posted By: badtlc
With what you posted in this thread, the insolubles of the FU was 0.2 and the MC was 0.1. I read that as higher with FU than MC. Did I misinterpret something?
If you look back at the insolubles with MC filters, you will find that most of them are 0.2 or higher--even with Pennzoil Ultra. In fact, in 20 UOAs, (18 of which are with a MC filter) only 4 of the 18 had a reading of less than 0.2. The remaining 14 were all 0.2, 0.3, and 0.4 (not all are in this post, but I can certainly post the 10 early ones). So I am not following your thoughts when you say that the Fram filter had higher insolubles than the MC filters do. If you mean on this particular run of M1, then I agree that yes, it was 0.1 points higher, but overall the MC filters have higher insoluble readings--even on some runs which were 50% shorter.
Originally Posted By: badtlc
And that is fine you have towing history to back that up but it makes no sense to comment about the cold if you "know" it was the towing that caused it.
The comment about cold and towing and iron has to do with the fact each time I towed in the cold, the iron levels were higher than towing in the heat--consistently and even with MC filters. I have towed in Colorado every winter and in Texas, Nevada, and Wyoming every summer. Although not a controlled test of any sort, the iron readings support what I am saying.
Originally Posted By: badtlc
Engine sound isn't the only indication of proper ADBV operation.
Based upon what you are saying about the ADBV, am I to assume the MC filters were malfunctioning as well because the iron/insoluble levels were higher on some runs? I am not being sarcastic here, I am attempting to follow the logic.