Synthetic oils have smaller molecules (carbon chains) so it's entirely possible that the low-RPM pressure will drop just a smidgen -- the synthetic oil can get through tight spaces better than the larger "natural" oil molecules. I don't think you have a problem. Perhaps you could tweak the alarm just a little? It sounds interesting, obviously much more sophisticated than my simple alarm. Can you share a diagram of the design?

Jeremy

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970