So, we've been kinda half ass tracking our oil pressure switch failures and it seems even OEM Honda switches are not what they used to be. I did a little testing with the OEM switch, poked around the web and found this. Specifically the A2-6811. I bought one to test and it is currently installed on my E and working. VTEC does not know the difference. I had to use an adaptor to go from SAE to metric and made a plug to go from stock to spade connectors. I have contacted Dwyer to see if they can make them with metric thread and what kind of production numbers it would take. Fingers crossed.