Ok so the s70 is well into the 200k + area and on cold starts you can hear a rod do the scary no oil pressure (Worn bearing) start up rattle..Its very faint but I know the sound well.. I jus did a head job on it and it runs great but this is my long freeway commute car and when My s10 had the rattle it wasnt long before it flung a rod through the block while on the freeway.. Thia is for sure a better built engine then the s10 and runs much lower freeway rpms but even adding the "cushion oils" I'm a bit nervous about freeway trippin in it for much longer....

Any thoughts/advice how to milk this car a bit longer without a tear down?

Thanks