As for your oil pressure question, I have 6k miles on a rebuilt 3VZE with the original oil pump that checked out fine for clearances against the FSM procedure. The pressure ran between the first and second mark once warmed up at cruising, a little lower at idle. Then I replaced the sending unit (it was the stock sender), and it went up to midrange at cruising RPM.

I have Bosch Platinum plugs in mine, have not had any issues with them yet, but am keeping an eye out, given the input I have been seeing on this board.

Mike