have to look about the bars.
had the flow rate in normal conditions at 180 sec. nothing changed on highway. now i experiment with 120 sec.
and with my red wheels i can see if it is too much oil
in rain i set up 50 sec or so.
I have finished ~1500 km 3.5 day tour with mixed roads: a bit of straights, a bit of forest twists, a bit of narrow hairpins on Nockalmstrasse and Gross Glockner, and just ~150 km on a highway.
It seems that drop per 90 seconds was a bit too often, as I got some oil/dirt collected around, although at least chain was nicely lubricated.
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I guess I'll have to follow your example and try 120 or 180 seconds interval...