Dang! What are they called? Not the usual full-flow oil filter, but the supplemental, second filter that can be added to receive maybe 5% of the flow and filter it of teensy particles. Micron level.

It's just an idea, but if you plumbed a full-flow filter and one of these other guys in PARALLEL, would the inherent restriction (more filter area, more fine filtering inside...) be enough to restrict the flow to the 2nd filter adequately? A dual oil filter, plumbed in parallel, not serially. Maybe that's normal. I've only seen them in catalogs.

Why? I got a couple Saab oil filter mounts for cheap at Pick n Pull. Beautiful pieces of work. (And uncoupling one from lines that ran to an oil cooler at the left front corner of the car was enough to convince me that Saabs must be meant for the rich: a bump there and $$$ ka-ching! for a very custom sculpted oil cooler.) I want to mount them up in the generous space of the 700, play with them, and NEVER again lean over and fight the Volvo filter and NEVER again see it dribble oil on the $75+too-much-work rubber motor mount.

Is this making sense? It's about this stage that I feel engineeringly challenged.

Ach! On reflection this makes NO sense. Feed only cleaned oil to SuperFilter! One more time, then: lead oil from oil pump to typical full-flow filter, and return 95% of the oil to do its chores in the heart of the block, while letting the other 5% flow in a ca. 1/10" dia. line to superfilter before returning it. Closer to some truth, I hope.

Thanks for your help.

Gregg