I have not used their products but I can tell you that a Volvo doesn't need
any help other than regular oil changes. Even with irregular oil changes they
are almost bulletproof. At 204,000 miles my 164 had NO measureable crankshaft
or crankshaft bearing wear (by plastigage). That is, ALL rod and main bearings
were within new clearance specs. And that is with oil changes ranging from
3000 to 10,000 miles apart and no particular care. Cylinder wear was less than
0.005" so a new set of rings (and a new timing gear) would have fixed it up.
The only place I would use moly products on a Volvo engine would be when
installing a cam and lifters, then I would put a smidge on each lifter face
to hold them till the oil pressure gets up the first time.
--
George Downs, Bartlesville, Oklahoma, Central US