I think you should move to a better neighborhood there is a lot of bad info i there....
withe regard to losing compression there is always that chance with high a mileage engine ...
you say that engine had been rebuilt @ 90K so the mileage clock starts there.....
so based on that it is a low mileage engine
some engines when maintained properly mileage is not an issue
so what if it starts losing relatively speaking that is an easy fix.....
So ask your neighbor to leave, and get with replacing your gaskets......
