Here's the scoop.
93 940 w/ 267K, bought with 140K in 2002. Over time had a variety of issues relating to large to small coolant loss, eventually resulting in overheating off and on and a diagnosis of head gasket failure.

I have done a head gasket repair on a 740t with help ..had no desire to do it again, at least not right now. The 800+ being quoted to repair did not sound appealing either.

I decided to try Bar's Head Gasket Repair ($10) ...after ..
1) a buddy had tried it on his really dilapidated 740, and it worked ..&
2) I spoke to one of Bar's techs for an assurance that it would not clog my system.

Well, so far - so good. The miss that I had at start up (#2 plug getting wet) is gone, and the pressure and temp are holding very nicely.

I know this is taboo to many, but I just wanted to pass the info on to those who might have interest.

OH ..I followed the instructions really closely. :)
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' Of all bad men religious bad men are the worst. '' (C S Lewis