Scott Oilers were conceived and designed when chains were "open" linked
![Wink](http://www.bikermatch.co.uk/sites/bm/forum/rte/images/smiley2.gif)
Before the advent of "O" & "X" ring chains
![Approve](http://www.bikermatch.co.uk/sites/bm/forum/rte/images/smiley14.gif)
These older "standard" roller chains needed lubricating "inside" the rollers
![Thumbs Up](http://www.bikermatch.co.uk/sites/bm/forum/rte/images/smiley20.gif)
So a heavier flow rate was required for this type of chain to ensure that some oil penetrated "inside" the rollers
![Smile](http://www.bikermatch.co.uk/sites/bm/forum/rte/images/smiley1.gif)
With the "sealed" type "O" & "X" ring chains only the sprockets and outer plates require lubing
![Thumbs Up](http://www.bikermatch.co.uk/sites/bm/forum/rte/images/smiley20.gif)
Meaning a much reduced flow is required to deliver sufficient lube
![Big smile](http://www.bikermatch.co.uk/sites/bm/forum/rte/images/smiley4.gif)
Thats why I recommend the PDoiler as being electronic the flow rate is much easier to regulate