just like they sell stop smoke at autoparts stores that suppose to stop your engine from smokeing and to soften up your valve seals
well i can't really say nothing about the 3 or 4 people that it worked for, but if we was to do a poll i would bet that
1 out of every 10 people will say that method actually works
go ahead and try, you might be that lucky 1
you did make a good point though
$20 worth of gear oil and a pump to put the oil in, is way better than coughing up $500 or so. Thats if you are one of them lucky people.