Good grief. I had it tested with the 93 brushes at the first place, that I trust a lot more than the 2nd (the 2nd being Oreilly). It tested at 13.2, scarcely better than with the old brushes. So is this true variation, or just a freak thing? I have tested it at several points and came up with similar variation. I don't know if brushes could be responsible for this or not.

So now I am thinking a remanufactured Denso may be my best way out of this, but they are a bit too spendy for me at the moment. I may have no choice but to try new brushes, at least they are cheap and I can always use them on my 4runner if I buy a reman.