As I've said before, these mismatched senders are criminally inaccurate. I once tested 10 different senders all the same brand, and got 8 different pressures on my factory gauge. So I selected the one that gave the closest reading to a cheap mechanical gauge mounted on a T fitting with the sender. I use the stock gauge to tell if the engine is running. If I want to see what the actual oil pressure is, I open the deck lid and look at the mechanical gauge. Works for me....
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