I'm one of those guys who used them and stopped.
In our GM fleet V8's they would not give the fast, flushing drain that the stock bolt does. They also left a small amount in the pan. Over time this appeared to lead to a sludgy build up in the bottom.
They are still on our blowers and CAT pumps, and on my boat, so I am not completely against them.
Just be aware that like many mods they should be carefully evaluated IMO...
In our GM fleet V8's they would not give the fast, flushing drain that the stock bolt does. They also left a small amount in the pan. Over time this appeared to lead to a sludgy build up in the bottom.
They are still on our blowers and CAT pumps, and on my boat, so I am not completely against them.
Just be aware that like many mods they should be carefully evaluated IMO...