The flange IP setting for 1 drip every 20 secs or 1 drip every sec is probably so close to actual IP adjustment.... that whenyou tighten down the IP it may vary that much anyway....
Try both drip counts if you want to see if it does much...
You could call several Bosch shops and see what they say....
I thought I was the only one that worries about this stuff and cannot sleep for thinking about it....but that is a good thing when it comes to our oil motors...

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1978 Yellow 300D (The Mustard Toad)
1980 Blue 240D (The Iron Toad)
1989 Grey Mitsu.4WD Mighty Max Pickup (Needs a Diesel transplant bad)

(Open the pod bay doors HAL)