Cannot comment on the Bosch 3 electrode plug--never used them. I've been running Bosch platinums in my 87 4kq (160,000 miles) for about a year or so now. My reaction is "ho-hum." Cannot see where they are any better than NGK, champion or anything else I've used in the car. No apparent increase in power, no changes in mpg, engine does not seem to run smoother or rougher, etc. Bill Murin